Consulta: creatorFacets:"Ooststroom, S.J. van"
Registros recuperados: 114
Data/hora: 02/06/2024 15:50:56

On Decalobanthus, a new genus of Convolvulaceae from Sumatra
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Being occupied with studies on the Convolvulaceae of Netherlands India I met with a remarkable specimen in the Buitenzorg Herbarium, collected by Dr. O. POSTHUMUS during the expedition in Djambi (Sumatra) in the year 1925. At first sight this plant seemed to be a Merremia. A closer examination, however, soon showed some important differences with that genus, especially in respect to the corolla, which has a long, narrow and rather fleshy tube and a limb with 5 short, reflexed (or patent?) lobes. Each lobe is deeply bifid, so that the limb appears 10-lobed. The middle part of the lobes is fleshy just as the tube; it corresponds with a midpetaline field of the corolla of most genera of Convolvulaceae, the lateral parts of the lobes (lobules) are much...
Tipo: Article / Letter to the editor
Ano: 1936
URL: http://www.repository.naturalis.nl/record/524471

Reviews
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Lam, H.J.
The editor has received the first and second fascicle of a treatise of the vascular plants of West Virginia. According to the preface this flora, when complete, will present descriptions, illustrations, geographical data and other information, particularly of local interest for the approximately 2000 species found growing without cultivation in that State. The first part contains the Pteridophyta, Gymnospermae, and Monocotyledoneae, the second part the Dicotyledoneae, p.p. (Saururaceae-Leguminosae). Keys are given for genera and species. The rather short descriptions are completed by many for the greater part original line drawings. Nomenclature and sequence are those of the 8th edition of Gray’s Manual, 1950, by M. L. Fernald.
Tipo: Article / Letter to the editor
Ano: 1953
URL: http://www.repository.naturalis.nl/record/524629

The identity of Anthericum Rouwenortii de Gorter (Liliaceae)
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Anthericum Rouwenortii De Gorter, a species not occurring in the Index Kewensis, was described by De Gorter in his Catalogus Plantarum Horti Ulenpassiani, 1783, p. 51 and 52 as follows: p. 51 : AUTHERICUM. 2. Rouwenortii. foliis planis carinatis, scapo ramoso, corollis patentibus. Tab. I. Habitat in Zeylona? Planta e seminibus e Zeylona, si bene meminit III. Baro De ROUWENOORT missis, ante multos annos enata colitur adhuc in Caldario Horti Uilenpassiani, ubi quotannis floret. Descriptio. Badix crassa, tuberosa, subtranslucida. Folia radicalia, ensiformia, carinata, glabra, sesquipedalia, extremitate subulata. p. 52: Scapus ramosus, fere tripedalis, ramis alternis, inferioribus brevioribus, superioribus longioribus. Bracteis lanceolato-subulatis bifidis....
Tipo: Article / Letter to the editor
Ano: 1941
URL: http://www.repository.naturalis.nl/record/524875

De in Nederland adventieve en verwilderde Calandrinia-soorten
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
Two species of Calandrinia H. B. K. have been found in the Netherlands as aliens or escaped from cultivation: C. elegans Spach, from California and C. compressa Schrad. ex DC., from Chile. They can be distinguished as follows: 1. Leaves of the involucre (‘calyx’) free, ovate, acuminate at the apex, about half as long as the perianth (‘corolla’), in fruit 8—12 mm long. Capsule slightly shorter than to as long as the involucre ............................... 1. C. elegans 1’. Leaves of the involucre connate at the base, slightly shorter than the perianth, in fruit 5—7 mm long, the free portion broadly triangular and acute. Capsule longer than the involucre... ................................ 2. C. compressa
Tipo: Article / Letter to the editor
Ano: 1966
URL: http://www.repository.naturalis.nl/record/526758

Reviews
Provedor de dados: 16
Autores: Hou, Ding; Steenis, C.G.G.J. van; Lam, H.J.; Ooststroom, S.J. van; Barkman, J.J.
The publication of the supplement 1 of the well known and essential reference work of “A Bibliography of Eastern Asiatic Botany” is very welcome. It is a continuation of the original work, which closed with 1936, and extends through 1958. It covers the botanical literature on eastern Asia, as indicated by the title, which comprises China, Japan, Korea, Ryukyu, Mongolia and Soviet eastern Asia, as well as the major published papers appertaining to adjacent areas. It has been prepared on essentially the same pattern as the original volume while the subject index has been treated perhaps in a more thorough manner. The volume contains over 11,000 extensively and carefully annotated entries occupying 414 pages. The work is in English but the titles, papers and...
Tipo: Article / Letter to the editor
Ano: 1961
URL: http://www.repository.naturalis.nl/record/524871

Floristische notities 80—85
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
This series of “Floristische notities” contains the following notes: 80. Osmunda regalis L., known from the Dutch Frisian Islands Terschelling and Schiermonnikoog, also occurs on the island of Texel. 81. First record of Asplenium adiantum-nigrum L. for the Dutch Frisian Islands. 82. New localities of Cerastium holosteoides Fr. subsp. holosteoides and subsp. pseudoholosteoides Möschl in the tidal area of our large rivers. 83. New localities of Crambe maritima L. along the Dutch coast. 84. Moneses uniflora (L.) A. Gray, formerly known from Appelscha, prov. Friesland (1849) and Denekamp, prov. Overijssel (1906) was found in 1969 on the island of Terschelling. 85. The unexpected occurrence of Blackstonia perfoliata subsp. serotina (Koch) Vollm. near Buren...
Tipo: Article / Letter to the editor
Ano: 1970
URL: http://www.repository.naturalis.nl/record/527984

Over het verschijnen van Crepis sancta (L.) Babc. in Nederland
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
In connection with the finding of Crepis sancta (L.) Babc. in two localities in the southern part of the Netherlands province of Limburg, a survey is given of the extension of the area of this species through France and Belgium since 1763, when it was found for the first time in France near Nîmes, probably as an introduction from the eastern Mediterranean region.
Tipo: Article / Letter to the editor
Ano: 1966
URL: http://www.repository.naturalis.nl/record/527353

On the Asiatic species of Neuropeltis Wall. (Convolvulaceae)
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
In my first paper on Malaysian Convolvulaceae in Blumea III, 1938, p. 62—94, I pointed out (p. 83) that Neuropeltis racemosa Wall, has often been confounded both in literature and in herbaria with another species from the Malay Peninsula, N. Maingayi Peter. Moreover, on p. 85, I expressed my doubt whether specimens from Indo China, mentioned in literature as N. racemosa Wall, (by Gagnepain &amp; Courchet in Lecomte, Flore Generale de l’Indo-Chine IV, 1915, p. 290, fig. 31) actually belong to that species. A more detailed study of materials from Indo China has now brought to light, that the plants from that country are different from those occurring in the Malay Peninsula and that they represent a new, though closely related, species. Specimens from the...
Tipo: Article / Letter to the editor
Ano: 1942
URL: http://www.repository.naturalis.nl/record/525851

On an 18th century oil-planting of botanical interest
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
A few years ago Prof. Dr W. Martin, at the time director of the Gallery of prints and drawings at Leyden, drew my attention to an oilpainting at Prof. J. N. Bakhuizen van den Brink’s, 40 Rapenburg, Leyden. This painting (size 95 X 68 cm), which is owned by the Leyden University Fund, shows a peculiar group of flowering exotic plants, to which a few mushrooms, a snake, a lizard and some butterflies are added, and on the right side in the back-ground a view on a river or a lake. In the lower right hand corner the painting is signed Lau. Vinn. Prof. Martin concluded from this that it was one of the Haarlem painters Van der Vinne who made it. The most plausible inference seemed to look upon the senior Laurens van der Vinne (1658—1729), a well-known Dutch...
Tipo: Article / Letter to the editor
Ano: 1946
URL: http://www.repository.naturalis.nl/record/526335

Korte mededeling
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Beckeropsis petiolaris (Hochst.) Fig. &amp; De Not. in Nederland. In Gorteria 3 (4), 1966, p. 55 vermeldden Reichgelt en ik een adventieve Beckeropsis van Rotterdam, die wij met enige aarzeling als B. petiolaris bestempelden. Intussen verscheen van de hand van W. D. CLAYTON, in Hooker’s Icones Plantarum, ser. 5, vol. 7, part 2, 1967, tab. 3643, p. 1—4, een overzicht met determinatietabel van de 6 soorten van dit geslacht die alle in tropisch en Zuid-Afrika thuishoren. Naar aanleiding van mijn verzoek aan hem, deelde de heer Clayton mij mede, dat onze voorlopige determinatie juist was, zodat wij B. petiolaris nu met zekerheid in de lijst van in Nederland gevonden adventieven kunnen opnemen.
Tipo: Article / Letter to the editor
Ano: 1969
URL: http://www.repository.naturalis.nl/record/526735

Inleiding
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Dit Correspondentieblad stelt zich ten doel het contact te bevorderen tussen hen, die zich bezig houden met floristisch en plantensociologisch werk. Het wil de Nederlandse floristen en plantensociologen, zowel amateurs als vakbiologen, in staat stellen elkaar op vlotte wijze van hun vondsten of denkbeelden op de hoogte te brengen en zich op een gemakkelijke manier met vragen of verzoeken tot elkaar te wenden. Verder wil het trachten hen op de hoogte te houden van nieuwe literatuur, die voor de floristiek en het vegetatieonderzoek van belang is en van andere zaken, die hun belangstelling kunnen hebben. Het zal daartoe bevatten korte mededelingen van floristische en plantensociologische aard, beknopte excursieverslagen, opgaven van nieuwe literatuur,...
Tipo: Article / Letter to the editor
Ano: 1956
URL: http://www.repository.naturalis.nl/record/534234

De in Nederland adventieve Amsinckia-soorten
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
Hut determineren van de in Nederland nog al eens met graan aangevoerde vertegenwoordigers van het Boraginaceae-geslacht Amsinckia Lehm. levert met de in onze flora’s voorkomende tabellen nog al moeilijkheden op. Bij de bewerking van dit geslacht voor de Flora Neerlandica stelden wij een determinatietabel op, die, naar het ons voorkomt, wat meer zekerheid geeft. Voor een juiste bepaling der soorten is het beslist nodig om of levende bloemen te onderzoeken òf gedroogde bloemen op te weken, daar anders het aantal nerven van de bloemkroon en de plaats van inplanting der meeldraden niet te zien zijn.
Tipo: Article / Letter to the editor
Ano: 1961
URL: http://www.repository.naturalis.nl/record/534155

Reviews
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Touw, A.
The Rijksherbarium received this finely illustrated book from Mr. Anghelos N. Goulandris, chairman of the Board of Governors of the Goulandris Botanical Museum, Kifissia, Greece. In the accompanying letter Mr. Goulandris wrote that this is the first publication of the recently (1963) founded Museum, an institution which has the object of promoting and assisting plant taxonomic activity and research in Greece. The beautiful botanical paintings were made by Mrs. Niki Goulandris, of Athens. They depict many Greek endemics but also species of a much wider distribution. All illustrations are, however, as the author’s introductory note says, of outstanding native wild flowers, especially collected for this purpose by the late Dr. C. N. Goulimis, who also drew up...
Tipo: Article / Letter to the editor
Ano: 1970
URL: http://www.repository.naturalis.nl/record/525741

De ondersoorten van Cerastium holosteoides Fr. in Nederland
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
Of Cerastium holosteoides Fr. three subspecies occur in the Netherlands. Subsp. triviale (Murb.) Möschl is common throughout the country, subsp. holosteoides and subsp. pseudoholosteoides Möschl are very rare and only found in a few localities in the tidal area of our larger rivers (island of Dordrecht; Biesbosch). The three subspecies may be distinguished as follows: 1. Leaves hairy above. Indumentum of the plant consisting of long, very acute hairs, whether or not mixed with glandular ones.............. subsp. triviale 1’. Leaves glabrous above, at most ciliate at the margin. 2. Indumentum of the plant consisting of very acute hairs, which are, however, shorter than in subsp. triviale; glandular hairs present or lacking (fig. 1, b-c) subsp. holosteoides...
Tipo: Article / Letter to the editor
Ano: 1961
URL: http://www.repository.naturalis.nl/record/526495

Over het voorkomen van Trifolium micranthum Viv. in Nederland
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
The author gives an enumeration of the localities in which Trifolium micranthum Viv. is found in the Netherlands.
Tipo: Article / Letter to the editor
Ano: 1968
URL: http://www.repository.naturalis.nl/record/526905

De in Nederland adventief gevonden vormen van Scorpiurus muricatus L
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
This paper gives a survey of the forms of Scorpiurus muricatus L. In contradistinction to Thellung who distinguished in his “Flore adventice de Montpellier” 4 subspecies, the present authors subdivide the species into 2 subspecies, each with some varieties. They can be identified with the aid of the following key. In using this key, one must be aware of the fact that several transitions between the subspecies and the varieties exist. 1. Calyx-teeth triangular, shorter than to about as long as the tube. Pod loosely coiled, almost in one plane. Ribs of pod all smooth or only the outer ones muricate or spiny; spines stout, at most as long as the diameter of the pod. Seeds mostly slightly curved subsp. muricatus 2. Ribs of pod all smooth ........... var....
Tipo: Article / Letter to the editor
Ano: 1964
URL: http://www.repository.naturalis.nl/record/527618

Aanwinsten voor de Nederlandse adventief-flora, 8
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
This paper discusses acquisitions to the adventitious flora of the Netherlands, mainly found in the year 1964. 1. Erucastrum nasturtiifolium (Poir.) O. E. Schulz was most likely introduced with blocks of granite for the “Delta-works”, near Hellevoetsluis, prov. of South Holland. It is indigenous in parts of Southern and Central Europe. Differences between this species and the native E. gallicum (Willd.) O. E. Schulz are given. 2. Euphorbia dentata Michx., a native of the Central United States and Mexico, was found along a highway near Bodegraven, prov. of South Holland. As far as known to us this is the first record of introduction of the species into Europe. 3. Trientalis borealis Raf., a North American species, was found in a wood near Apeldoorn, prov....
Tipo: Article / Letter to the editor
Ano: 1965
URL: http://www.repository.naturalis.nl/record/526805

Verwilderde en ingeburgerde sierplanten
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
In Corr.bl. no.1, p.11 (december 1956) vroegen wij on opgaven van vindplaatsen; liefst met zo nauwkeurig mogelijke gegevens betreffende de standplaats van enige soorten, die hier te lande min of meer ingeburgerd zijn, en wel van Impatiens glandulifera Royle, Polygonum cuspidatum Sieb. et Zucc. en Rudbeckia laciniata L. Over de eerste twee soorten ontvingen wij vrij veel gegevens, over de laatste slechts een enkele. Wij willen nu aan de hand van de ontvangen opgaven, gecombineerd met de ons reeds uit herbarium en literatuur bekende gegevens samenvatten? wat ons nu over de bovengenoemde soorten bekend is. Allen, die ons opgaven zonden, danken wij hierbij voor hun moeite; wij zijn echter overtuigd, dat er een vollediger beeld ontstaan zou zijn, als nog meer...
Tipo: Article / Letter to the editor
Ano: 1957
URL: http://www.repository.naturalis.nl/record/534148

De vruchtgal op Veronica catenata Pennell
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
Enige tijd geleden werden ons door Prof. Dr. Docters van Leeuwen een aantal Veronica-planten gezonden met gallen van Gymnetron villosulum Gyll., met het verzoek, uit te maken, welke exemplaren tot V. anagallis-aquatica L., welke tot V. catenata Pennell behoorden. Het bleek, dat alle gezonden planten tot de laatste soort moesten worden gerekend. Wij hebben toen het materiaal van deze twee soorten, dat in de collectie van de Kon, Ned. Botanische Vereniging en in die van het Rijksherbarium aanwezig is, nader bestudeerd, en kwamen tot de verrassende ontdekking, dat geen enkel der daarin aanwezige exemplaren van V. anagallis-aquatica door de gal aangetast was en dat deze uitsluitend bleek voor te komen op V. catenata, Daar bovengenoemde herbaria een rijk...
Tipo: Article / Letter to the editor
Ano: 1958
URL: http://www.repository.naturalis.nl/record/534249

Some notes on a collection of aquatic phanerogams from the Netherlands West Indian Islands, and from Venezuela and Columbia
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
In the year 1930 Mr P. WAGENAAR HUMMELINCK, Utrecht, made a trip to the Netherlands West Indian Islands of Curaçao, Bonaire and Aruba with the intention of collecting zoological objects and of gathering data of zoogeographical interest (see lit. 8). In the years 1936—37 he again collected in these islands and, moreover, visited the islands of Margarita and Los Testigos off the coast of Venezuela, the Venezuelan peninsula Paraguaná and the Colombian peninsula La Goajira. To get a better impression of ecological circumstances in pools and puddles of which a zoological inventory was made, he also gathered Algae and floating and submerged Phanerogams occurring in the collecting stations. On the collector’s request the present author made a study of the aquatic...
Tipo: Article / Letter to the editor
Ano: 1940
URL: http://www.repository.naturalis.nl/record/535073

An old collection of plants from Surinam in the Rijksherbarium at Leiden
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Some time ago I described in Blumea (5) a plant collection in book-form, collected by Hermann in Ceylon. This collection consists of two large volumes, each containing a number of dried specimens. Besides these two volumes, the Rijksherbarium is in the possession of a third one of the same size and with a similar binding, bearing on its back the title in golden characters on a darker ground: Herb: Viv: Promont. Bonae Spei Vol: I.  When I saw the specimens of this volume for the first time, it struck me that they did not show the peculiar type of plants from the Cape region. A somewhat closer examination lead me to the supposition, that I had to do with plants from South America. I was strengthened in that opinion by the fact that many of the vernacular...
Tipo: Article / Letter to the editor
Ano: 1939
URL: http://www.repository.naturalis.nl/record/534960

Boekbesprekingen
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Flore générale de Belgique. Spermatophytes, vol. V, fascicule 1, par A. LAWALRÉE. Bruxelles, 1966, 108 p., 30 fig. Van deze flora, die ook voor de Nederlandse botanicus van groot belang is, verscheen onlangs de eerste aflevering van het 5e deel der Spermatophyten, evenals de vorige afleveringen — telkens 3 per deel — bewerkt door Dr. Lawalrée van de Rijksplantentuin te Brussel. Deze aflevering bevat de families der Tiliaceae, Malvaceae, Guttiferae, Elatinaceae, Cistaceae, Violaceae en Thymelaeaceae. Met de afsluiting van het 5e deel waaraan dus nu nog 2 afleveringen ontbreken zullen nu alle in België voorkomende families der Choripetalae zijn behandeld. Resteren dan nog de Sympetalae en de Monocotyledoneae. Wij spreken de hoop uit dat ook deze groepen door...
Tipo: Article / Letter to the editor
Ano: 1966
URL: http://www.repository.naturalis.nl/record/527510

Korte mededelingen
Provedor de dados: 16
Autores: Hoekstra, J.A.; Ooststroom, S.J. van.
De koningsvaren op Schiermonnikoog. Terschelling (zie Gorteria 3, no. 13, 1967, p. 204) is niet het enige Waddeneiland waarop Osmunda regalis is gevonden. In 1964 werd één exemplaar aangetroffen in het Grieënglop op Schiermonnikoog, een vlak terrein aan de rand van het binnenduin, dat eens is afgegraven. De begroeiing van het middendeel is op sommige plaatsen door verscheidene zeggesoorten en grassen, kruipwilg en heide-achtigen als vegetatievormende soorten gekenmerkt. De plant groeide in een betrekkelijk droog gedeelte. Deze vondst werd reeds vermeld in de lijst van nieuwe vindplaatsen in Gorteria 2, no. 9, 1965, p. 110.
Tipo: Article / Letter to the editor
Ano: 1966
URL: http://www.repository.naturalis.nl/record/528059

Een Nederlandse vondst van Vallisneria spiralis L
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
Vallisneria spiralis L. was found at Maastricht in 1960 in the canal from that town to Liège. It has possibly been introduced from one of the localities in the river Meuse near Liège, where the species has established itself since about 1955.
Tipo: Article / Letter to the editor
Ano: 1962
URL: http://www.repository.naturalis.nl/record/527723

Adventieve Biscutella’s
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Two species of Biscutella, viz. B. auriculata L. and B. didyma L. are known as aliens in the Netherlands. They can be distinguished from each other as follows: 1. Petals c. 10—15 mm long, with a long claw. Outer sepals saccate at the base. Silicula not emarginate at the apex, but narrowed into the style .............. 1. B. auriculata L. 1’. Petals c. 3—5 mm long, with a very short claw. Outer sepals not saccate. Silicula emarginate at the apex .............................. 2. B. didyma L. Of B. didyma both var. leiocarpa (DC.) Halacsy (glabrous fruits) and var. ciliata (DC.) Halacsy (fruits with ciliate margins and sometimes with short hairs on the valves) have been found.
Tipo: Article / Letter to the editor
Ano: 1970
URL: http://www.repository.naturalis.nl/record/527507

A new species of Argyreia from Sumatra (Convolvulaceae)
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Frutex scandens. Caules in statu florigero foliis destituti, internodiis longis, usque ad 18 cm metientibus, in nodis ramulos laterales breves vel apicem versus inflorescentias emittentes. Ramuli laterales folia nonnulla vel inflorescentias gerentes, internodiis multo brevioribus vel brevissimis. Caules teretes vel juniores obscure angulati, griseo-brunnei, in sicco longitudinaliter hinc inde transversaliter rugosi, juniores pilis brevibus adpressis praediti, adultiores glabri, plusminusve verrucosi (lenticellati). Folia petiolata ; petiolo breviter et adpresse piloso ut in partibus junioribus caulis, supra sulcato, ad 6 cm longo; lamina ovato-oblonga, apice breviter acuminata, basi ± rotundata (vel in foliis junioribus late cuneata), nervis exceptis...
Tipo: Article / Letter to the editor
Ano: 1945
URL: http://www.repository.naturalis.nl/record/525857

The Convolvulaceae of Malaysia, VII
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
In addition to my papers on the genus Argyreia in Malaysia I can here give a few descriptions of new species, mainly from Sumatra and Borneo, and some critical notes on others. A revision of the species of Malaysia as a whole, including those of the Malay Peninsula and the Philippine Islands will be published in the near future in Flora Malesiana.
Tipo: Article / Letter to the editor
Ano: 1952
URL: http://www.repository.naturalis.nl/record/524993

Nieuwe vondsten van zeldzame planten in Nederland, hoofdzakelijk in 1964
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
A list of new localities of rare and interesting species found in the Netherlands mainly during 1964.
Tipo: Article / Letter to the editor
Ano: 1965
URL: http://www.repository.naturalis.nl/record/528069

Obituary Dr A. W. Kloos (1880—1952)
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
At the end of the previous number of “Blumea” could just be inserted the death notice of one of the honorary collaborators of the Rijksherbarium, Dr Ir A. W. Kloos, who passed away in his home at Dordrecht on June 3rd, 1952. A more detailed obituary may follow here. Abraham Willem Kloos was born at Wormerveer on April 10th, 1880. At West-Knollendam he attended his father’s school, afterwards went to the secondary school at Zaandam, and, in 1903, he took his degree as a civil engineer at Delft. Then, from 1904 till 1905 he worked as a teacher to the Nautical School, Schiermonnikoog, and from 1905 till 1911 he taught at the Secondary School, Goes. In the latter year Kloos was appointed to the Technical School, Dordrecht, where he worked until his retirement...
Tipo: Article / Letter to the editor
Ano: 1952
URL: http://www.repository.naturalis.nl/record/525939

In Memoriam Th. J. Reichgelt
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Op 5 juni van dit jaar overleed, zoals reeds in het vorige nummer van dit tijdschrift werd medegedeeld, na een vrij langdurige ziekte onze trouwe medewerker en vriend Thee Reichgelt. Theodorus Johannes Reichgelt werd op 12 februari 1903 te Nijmegen geboren en bereikte dus de leeftijd van ruim 63 jaren.
Tipo: Article / Letter to the editor
Ano: 1966
URL: http://www.repository.naturalis.nl/record/527528

Nieuwe vondsten van zeldzame planten in Nederland, hoofdzakelijk in 1973
Provedor de dados: 16
Autores: Mennema, J.; Ooststroom, S.J. van.
A list of new localities of rare species and interesting records of more common species found in the Netherlands mainly during 1973, subdivided in three categories: A. Native species; B. Adventitious species; C. Species escaped from cultivation. In list A comments have been added, where necessary.
Tipo: Article / Letter to the editor
Ano: 1974
URL: http://www.repository.naturalis.nl/record/527538

De Gorters Flora Belgica tweehonderd jaar oud
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Mennema, J.
Two centuries ago, in 1767, David de Gorter’s Flora Belgica was published. It was the first flora covering the whole territory of the Netherlands, in which Linnaeus’s binomial nomenclature was applied. It is to be regretted that by far the greater part of the Netherlands herbarium of De Gorter got lost.
Tipo: Article / Letter to the editor
Ano: 1967
URL: http://www.repository.naturalis.nl/record/527548

Het I.V.O.N. – Werk
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Het Instituut voor het Vegetatie-onderzoek van Nederland (I.V.O.N.) werd opgericht in 1930 en is thans gevestigd in het Rijksherbarium, Nonnensteeg 1 , Leiden, Het stelt zich o.a. ten doel om door stelselmatige inventarisatie een overzicht te verkrijgen van de verspreiding der in Nederland voorkomende Pteridophyta en Spermatophyta. Reeds in 1902 werd door de heren Dr. J.W.C. Goethart en W. J. Jongmans, destijds resp. conservator en assistent aan het Rijksherbarium, een aanvang gemaakt motdit biogoo grafische onderzoek. In de jaren daarna werd het met medewerking van een aantal Nederlandse floristen voortgezet, waarna men wegens de toenemende betekenis van het werk en met medewerking van de heren Goethart en Jongmans in 1930 kwam tot de oprichting van het...
Tipo: Article / Letter to the editor
Ano: 1956
URL: http://www.repository.naturalis.nl/record/534158

Het geslacht Chloris in Nederland
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
The genus Chloris Sw. is represented in the Netherlands by 4 adventitious species, viz. C. virgata Sw., C. truncata R. Br., C. divaricata R. Br., and C. pycnothrix Trin. Descriptions of these species and figures of their florets are given. The four species may be distinguished with the aid of the following key: 1. Lemma of the bisexual floret in the upper part with c. 2-3 mm long hairs on the margin; hairs distinctly exceeding the top of the lemma. Leaves gradually narrowed into the acute apex ................................... 1. C. virgata 1’. Lemma of the bisexual floret nearly glabrous, or shortly hairy with hairs not exceeding the top of the lemma. Leaves abruptly narrowed into the obtuse or obtusish apex. 2. Lemma of the bisexual floret and of the...
Tipo: Article / Letter to the editor
Ano: 1962
URL: http://www.repository.naturalis.nl/record/527026

De geschiedenis van Rosa dumalis Bechst. in Nederland
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
The authors give a survey of the occurrence of Rosa dumalis Bechst. in the Netherlands and discuss the differences between this species and R. canina L.
Tipo: Article / Letter to the editor
Ano: 1963
URL: http://www.repository.naturalis.nl/record/528018

The Convolvulaceae of Malaysia, II
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
This is the second contribution to a series of papers dealing with the Convolvulaceae of Malaysia (Malay Peninsula and Archipelago, Philippine Islands and New Guinea). The genera worked out here belong to the tribe Convolvuleae; they are numbered VIII—XV. Genus VII, Erycibe, belonging to the Erycibeae shall be treated afterwards in a special monograph. With regard to the geographic arrangement of the specimens mentioned, some alterations had to be introduced due to the new limitation of the residencies in the island of Java. The names and limits of these residencies are now brought into line with the data of the ”Atlas van Tropisch Nederland“ ²).
Tipo: Article / Letter to the editor
Ano: 1939
URL: http://www.repository.naturalis.nl/record/525655

Een nieuwe variëteit van Solanum triflorum Nutt
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
A note on a new variety of Solanum triflorum Nutt., viz. var. dentatum Ooststr., found in 1938 near Nijmegen, prov. Gelderland. SANDWITH (2, p. 346) mentions a plant from Bristol, which is identical with this.
Tipo: Article / Letter to the editor
Ano: 1966
URL: http://www.repository.naturalis.nl/record/527956

Nieuwe vondsten van zeldzame planten in Nederland, hoofdzakelijk in 1969
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Mennema, J.
A list of new localities of rare and interesting species found in the Netherlands mainly during 1969.
Tipo: Article / Letter to the editor
Ano: 1970
URL: http://www.repository.naturalis.nl/record/528119

The Convolvulaceae of Malaysia, III
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Hallier ²) subdivided the Convolvulaceae into two groups, viz. the Psiloconiae, with smooth pollen grains, and the Echinoconiae with spinose ones. The genera of the Psiloconiae occurring in Malaysia have been dealt with in parts I and II of the present paper, with exception of the genus Erycibe, which shall be treated in a special monograph. The group of Echinoconiae contains two tribes, viz. 1. Ipomoeeae and 2. Argyreieae, both represented in Malaysia. The genus Ipomoea belongs to the Ipomoeeae.
Tipo: Article / Letter to the editor
Ano: 1940
URL: http://www.repository.naturalis.nl/record/525025

Nieuwe vondsten van zeldzame planten in Nederland, hoofdzakelijk in 1978
Provedor de dados: 16
Autores: Mennema, J.; Ooststroom, S.J. van.
The list of new localities of rare species and interesting records of more common species found in the Netherlands mainly during 1978, has been subdivided into three categories: A. Netherlands species; B. Adventitious species; C. Species escaped from cultivation. Category A includes the species — also naturalised ones — belonging to the Netherlands flora, as established by the Floristic Council in 1975 and inserted in the Standard List of the Netherlands Flora 1975 (ARNOLDS &amp; VAN DER MEIJDEN, 1976). In list A comments have been added, where necessary; adventitious records of Netherlands species are indicated with adv., escapes from cultivation with verw. The names of taxa new for the Netherlands, are in bold type.
Tipo: Article / Letter to the editor
Ano: 1979
URL: http://www.repository.naturalis.nl/record/527918

The Convolvulaceae of Malaysia, IV. (with Indices)
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
The genera Mina and Lepistemon belong to the Ipomoeeae Hall, f., Stictocardia and Argyreia to the Argyreieae Hall. f.
Tipo: Article / Letter to the editor
Ano: 1943
URL: http://www.repository.naturalis.nl/record/524889

Nieuwe vondsten van zeldzame planten in Nederland, hoofdzakelijk in 1966
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Mennema, J.
A list of new localities of rare and interesting species found in the Netherlands mainly during 1966.
Tipo: Article / Letter to the editor
Ano: 1967
URL: http://www.repository.naturalis.nl/record/528182

Boekaankondiging
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
STELLA ROSS-CRAIG, Drawings of British Plants, pars XXVI, 48 pl. G. Bell &amp; Sons Ltd., London, 1969 — 16/-s. Nadat wij in het juni-nummer van 1969 het verschijnen van deel 25 van het plaatwerk van Stella Ross-Craig aankondigden, is intussen deel 26 van deze serie verschenen. Ook dit deel is weer alleszins de aandacht van de Nederlandse floristen waard. Het bevat de volgende families: Polygonaceaey Thymelaeaceae, Elaeagnaceae, Loranthaceae, Santalaceae, Euphorbiaceae en Buxaceae. Op enkele uitzonderingen na zijn alle ook in Nederland inheemse vertegenwoordigers van deze families afgebeeld. Deze uitzonderingen zijn: Rumex scutatus L., R. thyrsiflorus Fingerh., Thesium pyrenaicum Pourr., Euphorbia esula L., E. palustris L. en E. seguieriana Neck., soorten...
Tipo: Article / Letter to the editor
Ano: 1970
URL: http://www.repository.naturalis.nl/record/527765

Melica nutans L. in Nederland
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Melica nutans L. was found in June 1965 in Bloemendaal (prov. N. Holland) near the country-seat Lindenheuvel. Most earlier records of it are misidentifications of M. uniflora Retz. It has probably been introduced with grass-seed or with plants from Switzerland.
Tipo: Article / Letter to the editor
Ano: 1970
URL: http://www.repository.naturalis.nl/record/526600

Nieuwe vondsten van zeldzame planten in Nederland, hoofdzakelijk in 1970
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Mennema, J.
Behalve nieuwe vondsten van zeldzame planten bevat deze lijst zoals gebruikelijk ook weer enige opgaven van vermeldenswaardige vindplaatsen van minder zeldzame soorten. Voor de namen van vaak in de lijst genoemde vinders zijn de volgende afkortingen gebruikt:
Tipo: Article / Letter to the editor
Ano: 1971
URL: http://www.repository.naturalis.nl/record/527173

Nieuwe vondsten van zeldzame planten in Nederland, hoofdzakelijk in 1972
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Mennema, J.
A list of new localities of rare and interesting species found in the Netherlands mainly during 1972, subdivided in three categories: A. Native species; B. Adventitious species; C. Species escaped from cultivation. In list A comments have been added, where necessary.
Tipo: Article / Letter to the editor
Ano: 1973
URL: http://www.repository.naturalis.nl/record/526925

Nieuwe vondsten van zeldzame planten in Nederland, hoofdzakelijk in 1967
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Mennema, J.
A list of new localities of rare and interesting species found in the Netherlands mainly during 1965.
Tipo: Article / Letter to the editor
Ano: 1968
URL: http://www.repository.naturalis.nl/record/527426

Argyreia lamii, a new species from the Malay Peninsula
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Among a number of specimens of Convolvulaceae from the Malay Peninsula sent to me for identification by Mr. J. Sinclair, Singapore, I found a species of Argyreia, which appeared to be new to botanical science. I named it A. lamii in honour of Prof. Dr. H.J. Lam, Director of the Rijksherbarium and Professor of Systematic Botany at the University of Leiden, to whom the present Jubilee-volume of Blumea is dedicated.
Tipo: Article / Letter to the editor
Ano: 1958
URL: http://www.repository.naturalis.nl/record/526371

Korte mededelingen
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Mennema, J.
Lycopodium clavatum L. in de Haarlemmerhout? Bij het doorzien van het materiaal van Lycopodium clavatum in het Rijksherbarium in verband met het gereedmaken van een verspreidingskaartje van deze soort voor de serie kaartjes, die wij hopen binnen niet te lange tijd te kunnen gaan publiceren, vonden wij een plant, waarvan de vindplaats nogal uit de toon valt. Alle aanwezige exemplaren van genoemde soort zijn nl. gevonden in het Drentse, Gelderse, Subcentreurope en Kempense district en in Zuid-Limburg. Deze plant echter werd verzameld in de Haarlemmerhout en wel door L. H. Buse samen met H. D. Gildemeester Buse, hoogstwaarschijnlijk vóór 1845, daar Buse tot omstreeks dat jaar in Haarlem woonde en in de omgeving daarvan botaniseerde. Etikettenverwisseling is...
Tipo: Article / Letter to the editor
Ano: 1968
URL: http://www.repository.naturalis.nl/record/526707

Adventieven aan de Maasoevers in Limburg
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
In Juni, Juli en September 1955 werden aan de oever van het gedeelte van de Maas, dat door het Juliana-kanaal is afgesneden, resp. door een I.V.O.N.-excursie, de excursie van de Commissie voor het Floristisch Onderzoek uit de K.N.B.V. en ondergetekenden een opvallend groot aantal adventieven verzameld, waarvan een 10-tal nog niet eerder in Nederland was aangetroffen. Door de zeer lage waterstand hadden deze adventieven zich volop kunnen ontwikkelen op plaatsen, waar door het graven van grint vele kuilen waren ontstaan en op de zand- en rolsteenstrandjes aan de luwe zijde van de bochten van de rivier. De zaden en vruchten zijn wel zeker door de Maas aangevoerd van hogerop in het stroomgebied gelegen fabrieken en losplaatsen; de wolfabrieken aan de Vesdre...
Tipo: Article / Letter to the editor
Ano: 1956
URL: http://www.repository.naturalis.nl/record/534193

Nadere gegevens over het voorkomen van Chenopodium chenopodioides (L.) Aellen in Nederland
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
In Acta Botanica Neerlandica 5, 1956, p. 323—324 the authors mentioned for the first time the occurrence of Chenopodium chenopodioides (L.) Aellen in the Netherlands from 6 places. During a revision of the Netherlands Chenopodium-species P. Aellen (Basel) found material of 10 more hitherto unknown localities.
Tipo: Article / Letter to the editor
Ano: 1965
URL: http://www.repository.naturalis.nl/record/527423

Aanwinsten voor de Nederlandse adventief-flora, 2
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
This paper contains acquisitions to the Netherlands adventitious flora from the year 1960. 1. Trifolium alexandrinum L., a species originally known only cultivated from the eastern part of North Africa, was found as an alien in an onion field at Poortvliet, near a wool factory at Tilburg, and along a roadside between Made and Geertruidenberg. Specimens formerly mentioned from the Netherlands under this name, appeared to belong to T. echinatum Bieb. 2. Senecio squalidus L., a species of mediterranean origin, naturalized in the British Isles since 1794, and also in recent years in France, Belgium and Sweden, was found in the Netherlands near the town of Middelburg in a storage yard for scrap-iron. 3. A number of plants escaped from cultivation, found in 1959...
Tipo: Article / Letter to the editor
Ano: 1962
URL: http://www.repository.naturalis.nl/record/527739

Boekbespreking
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
D.T.E. van der Ploeg, De floristiek van Oostelijk Friesland. Wetensch. Meded. no 36, febr. 1960, uitg. Kon. Ned. Natuurhist. Ver., 40 pag., geïll., f. 2,75 (voor leden van de K.N.N.V. en It Fryske Gea f. 2,25). Weer is één van da keurig verzorgde Wetenschappelijke Mededelingen van de K.N.N.V. verschenen. Zij bevat een bespreking van de floristiek van de oostelijke delft van Friesland, waarbij vooral aandacht wordt besteed aan de zandgronden, de „Wâlden”, hoewel ook de overige delen van het gebied worden behandeld.
Tipo: Article / Letter to the editor
Ano: 1960
URL: http://www.repository.naturalis.nl/record/534208

Aanwinsten voor de Nederlandse adventief-flora, 5
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
1. Navarretia squarrosa (Eschsch.) Hook. &amp; Arn. is mentioned here in addition to our last paper on the Netherlands adventitious flora, published in Gorteria 1, no. 10, 1963, p. 113—117. The species was found in 1962 near Joure, prov. Friesland, and was most probably introduced with bird-seed. 2. All Dutch specimens formerly named Erodium chium (Burm. f.) Willd. and E. cygnorum Nees appear to belong to the Australian E. crinitum Carolin. This species was found as an alien near the wool-mills at Tilburg, prov. N. Brabant and along the river Meuse near Meers, Grevenbicht, and Itteren, prov. Limburg. In the last named localities it was most probably introduced from the wool-factories along the Vesdre in Belgium. Differences between E. cygnorum and E....
Tipo: Article / Letter to the editor
Ano: 1963
URL: http://www.repository.naturalis.nl/record/526398

Korte mededeling
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Lycopodium annotinum L. op Terschelling. Deze soort, die tot nu toe van de Waddeneilariden alleen bekend was van Schiermonnikoog werd in 1967 aangetroffen op een tweetal plaatsen op Terschelling en wel bij de Noordsvaarder en bij de Boschplaat. De eerste vondst werd volgens opgave van de heer H. J. van Petersen (West-Terschelling) gedaan door de heer J. Mast in september van dat jaar, de tweede werd mij in januari 1968 door de heer Petersen opgegeven. Van beide vondsten is materiaal in het Rijksherbarium gedeponeerd.
Tipo: Article / Letter to the editor
Ano: 1966
URL: http://www.repository.naturalis.nl/record/527704

Boekbesprekingen
Provedor de dados: 16
Autores: Mennema, J.; Ooststroom, S.J. van.
In deze nieuwe druk van de Flora van Nederland werden aanvullingen en verbeteringen van verschillende aard aangebracht. Enige geslachten kregen een nieuwe omgrenzing, zoals Dryopteris, Epilobium, Althaea, Caucalis, Mentha, Euphrasia en Gentiana door afsplitsing van resp. Thelypteris, Chamaenerion, Alcea, Turgenia, Pulegium, Odontites en Gentianella en het geslacht Potentilla door het opnemen van Comarum palustre. Wijzigingen van nomenclatorische aard hebben o.m. tot gevolg gehad, dat oude vertrouwde namen moeten worden vervangen door nieuwe, waarvan de verandering van Phragmites communis in P. australis wel de meest ingrijpende mag worden genoemd. Wat de Nederlandse namen betreft is een aantal wijzigingen aangebracht als gevolg van besprekingen door de...
Tipo: Article / Letter to the editor
Ano: 1971
URL: http://www.repository.naturalis.nl/record/527712

Boekbespreking
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Deze reeds in de vorige aflevering van Gorteria aangekondigde flora behandelt de Pteridophyten en Spermatophyten, voorkomende in België, Luxemburg, de Nederlandse provincies Zeeland, Noord-Brabant en Limburg, het westelijke deel van de Eifel en de noordelijke departementen van Frankrijk, nl. Nord, Pas-de-Calais, Somme, Aisne, Marne, Ardennes, Meuse, Moselle en Meurthe-et-Moselle en is als zodanig ook voor de Nederlandse floristiek van groot belang. Na een algemene inleiding, waarin o.a. in het kort de plantengeografische districten, de levensvormen, het gebruik van de flora en het verzamelen en bewaren der planten ter sprake komen, volgen sleutels tot de families, geslachten en soorten. Onder de laatstgenoemde wordt geen beschrijving meer gegeven. Wel...
Tipo: Article / Letter to the editor
Ano: 1968
URL: http://www.repository.naturalis.nl/record/527500

Bibliographical Notes
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Dr. C. A. BACKER, Verklarend Woordcnboek van wetenschappelijke plantennamen (Explanatory dictionary of scientific plantnames) — Noordhoff-Kolff, Groningen-Batavia, 1936 — XII + 664 — Price: flh. 19.50. Many botanists and also sylvi-, liorti- and agriculturists and almost all taxonomists are, in the course of their daily task, meeting plant-names, the exact meaning, signification or derivation of which is not immediately clear to them. Being an intelligent and studious man, he often feels the desire to know more of a name than just its orthography and so he makes a grab at one of those books written to spread more knowledge about the matter. If it is the name of a genus or of a subgenus, WITTSTEIN’S „IIandwörterbuch” is the book he needs, although it yields...
Tipo: Article / Letter to the editor
Ano: 1936
URL: http://www.repository.naturalis.nl/record/524916

Over het voorkomen van Potamogeton trichoides in Nederland
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
Potamogeton trichoides Cham. &amp; Schld. gold tot voor kort als een der zeldzaamste fonteinkruidsoorten van ons land. In zijn bewerking van de Nederlandse Potamogetons in Ned. Kruidk. Arch. 46, 1936 geeft KLOOS als bekende vindplaatsen op: Ooy bij Nijmegen, Zwijndrecht, Tilburg en Valkenswaard. In de laatste jaren zijn er echter geleidelijk aan meer vondsten voor de dag gekomen, zodat CLASON in zijn manuscript voor de binnenkort te verschijnen aflevering van de Flora Neerlandica reeds vermeldt, dat het aantal bekende groeiplaatsen tot ca. 25 is toegenomen. Hij geeft op, dat de soort zeldzaam voorkomt op verspreide vindplaatsen, voornamelijk in het Haf-, het Fluviatiele- en het Kempense district, maar waarschijnlijk op vele plaatsen over het hoofd is...
Tipo: Article / Letter to the editor
Ano: 1964
URL: http://www.repository.naturalis.nl/record/526544

Nieuwe vondsten van zeldzame planten in Nederland, hoofdzakelijk in 1971
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Mennema, J.
In the list of new localities of rare and interesting species found in the Netherlands mainly during 1971 some alterations are introduced in comparance with previous lists. The most important alteration is the separation in three categories: A. Native species B. Adventitious species C. Species escaped from cultivation. In list A informations are added, where necessary.
Tipo: Article / Letter to the editor
Ano: 1972
URL: http://www.repository.naturalis.nl/record/526786

Typha angustifolia L. X T. latifolia L. (T.) (glauca Godr.) in Nederland
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
Typha x glauca Godr., the hybrid of T. angustifolia L. and T. latifolia L. was found in the Netherlands for the first time in 1847 and again in 1946, as appears from the collections in the Rijksherbarium, Leiden. Fig. 1 shows the differences found in the female flowers, the pollen, and the branchlets of the female part of the spike of T. angustifolia, the hybrid, and T. latifolia respectively.
Tipo: Article / Letter to the editor
Ano: 1962
URL: http://www.repository.naturalis.nl/record/527830

Neuropeltopsis, a new genus of Convolvulaceae from Borneo
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Among the rich collections made in Indonesia by Dr A. Kostermans (Bogor, Java) during the last decennia, there is an interesting species of Convolvulaceae from Borneo. It appears to be closely related to Neuropeltis Wall, but differs by a number of important characters justifying its acceptance as the type of a new genus, Neuropeltopsis. Neuropeltopsis Ooststr., genus nov., a genere Neuropeltide differt inflorescentiis racemosis longioribus minus densis, bracteis magnis albis superne in parte inferiore florem unum gerentibus, marginibus glabris loborum corollae multo latioribus, filamentis paene totiis ad corollam adnatis, stylo uno longo in apice breviter bifurcato.
Tipo: Article / Letter to the editor
Ano: 1964
URL: http://www.repository.naturalis.nl/record/525992

Nieuwe vondsten van zeldzame planten in Nederland, hoofdzakelijk in 1975
Provedor de dados: 16
Autores: Mennema, J.; Ooststroom, S.J. van.
The list of new localities of rare species and interesting records of more common species found in the Netherlands mainly during 1975, has been subdivided in three categories: A. Netherlands species; B. Adventitious species; C. Species escaped from cultivation. In comparison with former lists category A includes the species — also naturalised ones — belonging to the Netherlands Flora, as established by the Floristic Council in 1975 (MENNEMA, 1975) and inserted in the Standard List of the Netherlands Flora 1975 (ARNOLDS &amp; VAN DER MEIJDEN, 1976). In list A comments have been added, where necessary; adventitious records of Netherlands species are indicated with adv., escapes from cultivations with verw. In list B and C the names of the species, new for...
Tipo: Article / Letter to the editor
Ano: 1977
URL: http://www.repository.naturalis.nl/record/526413

Overzicht der vondsten van Crambe maritima L. in Nederland
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Mennema, J.
A list of localities in which Crambe maritima L. was found in the Netherlands, accompanied by a map of the distribution of the species in this country.
Tipo: Article / Letter to the editor
Ano: 1968
URL: http://www.repository.naturalis.nl/record/527170

Een Nieuw-Zeelandse Epilobium in Nederland verwilderd
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
Epilobium inornatum Melville, a species native in New Zealand, and cultivated in rock-gardens, has established itself in a number of parks and gardens in the Netherlands since 1932.
Tipo: Article / Letter to the editor
Ano: 1963
URL: http://www.repository.naturalis.nl/record/526759

Aanvullende gegevens op Gremmen en Kremers, De flora van de Nederlandse, Duitse en Deense Waddeneilanden
Provedor de dados: 16
Autores: Mennema, J.; Ooststroom, S.J. van.
A list of additions to GREMMEN &amp; KREMERS, The flora of the Netherlands, German and Danish Wadden islands (1971) is given. The names of the species, new for the Netherlands Wadden islands, are in bold type.
Tipo: Article / Letter to the editor
Ano: 1975
URL: http://www.repository.naturalis.nl/record/527639

In Memoriam J. Th. Henrard
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Dr. Jan Theodoor Henrard, former curator of the Gramineae at the Rijksherbarium, died at Leiden 28 August 1974, in his 93rd year. Among the staff-members of the Rijksherbarium there are only a few left who have known Dr. Henrard, as he retired in 1946 on reaching the age of 65. They will remember him as an enthusiastic taxonomist with a great love for the variation of living nature. He was always busy analyzing the often very slight differential characters of importance in the family to which he devoted a great part of his life, the Grasses.
Tipo: Article / Letter to the editor
Ano: 1975
URL: http://www.repository.naturalis.nl/record/524914

Nogmaals Vallisneria spiralis L
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
After Vallisneria spiralis was found in 1960 at Maastricht in the canal from that town to Liège, the species was discovered in 1962 in large quantities in the overflow of the river Meuse, in the Bosscherveld, north of Maastricht.
Tipo: Article / Letter to the editor
Ano: 1963
URL: http://www.repository.naturalis.nl/record/527354

Erigeron L., sectie Phalacroloma (Cass.) Cronquist in Nederland
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
Dutch floras mention two adventitious species of Erigeron L. sect. Phalacroloma (Cass.) Cronquist, viz. E. annuus (L.) Pers. [= Stenactis annua (L.) N. ab E.] and E. strigosus Mühlenb. ex Willd. [= Stenactis strigosa (Mühlenb. ex Willd.) DC.; S. bellidiflora (Wallr.) A. Br. ex Koch]. From a study of the specimens in several Netherlands herbaria appeared that only E. strigosus Mühlenb. ex Willd. has been found here. Nearly all the material belongs to var. septentrionalis (Fern. &amp; Wieg.) Fern.; only a few specimens represent var. beyrichii (Fisch. &amp; Mey.) A. Gray.
Tipo: Article / Letter to the editor
Ano: 1964
URL: http://www.repository.naturalis.nl/record/528023

Aanwinsten voor de Nederlandse adventief-flora, 6
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
Two acquisitions to the Netherlands adventitious flora from the year 1963. 1. Kochia scoparia subsp. densiflora (Turcz. ex Moq.) Aellen, distinguished from the typical subspecies by the long hairs at the base of the flowers, was found near Amsterdam as a grain introduction. 2. Tetragonolobus maritimus (L.) Roth. This species was found on the grassy slope of the Kunderberg near Voerendaal (prov. Limburg). It is supposed to be adventitious there, what is also said of the specimens from the nearest locality in Germany, the Schneeberg near Vaals, W. of Aachen. Polygonum compactum Hook. f. and Dicentra eximia (Ker) Torr., escaped from cultivation.
Tipo: Article / Letter to the editor
Ano: 1964
URL: http://www.repository.naturalis.nl/record/527499

Scleranthus polycarpos L. nieuw voor Nederland
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
Scleranthus polycarpos L. appears to be indigenous in the Netherlands. In contradistinction to its close ally S. annuus, which is almost exclusively a weed in cultivated ground on sandy soil, S. polycarpos occurs in more natural habitats.
Tipo: Article / Letter to the editor
Ano: 1966
URL: http://www.repository.naturalis.nl/record/527140

Enige voor Nederland nieuwe Chenopodiaceae
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
During his stay at the Rijksherbarium, Leiden, in November 1963 P. Aellen (Basel), specialist in Chenopodiaceae, revised most of the Netherlands material of this family. An enumeration of the more important results, viz. the first record for the Netherlands of 4 species of Chenopodium, 7 hybrids in this genus, and 2 species of Atriplex is given.
Tipo: Article / Letter to the editor
Ano: 1965
URL: http://www.repository.naturalis.nl/record/526576

Is Centaurea calcitrapa L. in Nederland uitgestorven?
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
Dat in Nederland vooral in de laatste halve eeuw vele plantensoorten zeldzaam of zeldzamer geworden of zelfs geheel verdwenen zijn, is een feit, dat iedere florist met enige ervaring heeft kunnen constateren. Voor deze vaak ontstellende afname zijn vele oorzaken aan te wijzen, en bij de meeste van de verminderende of verdwijnende soorten is de oorzaak ook vrij eenvoudig vast te stellen. Er komen echter enkele gevallen voor, waarbij de oorzaak niet zo voor de hand liggend is, en wij willen hier een geval bespreken, waarbij we er niet in slaagden een bevredigende verklaring te vinden. Centaurea calcitrapa is wel nooit een veel voorkomende soort in ons land geweest, maar was omstreeks 1900 toch. bekend van een 20-tal plaatsen op de Zeeuwse en Zuidhollandse...
Tipo: Article / Letter to the editor
Ano: 1957
URL: http://www.repository.naturalis.nl/record/534153

Reviews
Provedor de dados: 16
Autores: Lam, H.J.; Barkman, J.J.; Ooststroom, S.J. van; Soest, J.L. van.
This charming and handy book printed on excellent paper, with its numerous clear pictures of well-known Malayan plants, reminds one in many ways of Merrill’s “Plant Life of the Pacific World” (MacMillan 1946, New York), which has perhaps served Prof. Holttum as an example. Its size being only slightly smaller than Merrill’s book and the area covered being very considerably smaller, its descriptions of plants are naturally more detailed; the more so as only a choice has been made, in which the special interests of the author — ferns, orchids, gingers — are evident though not predominant. The plants described are not regionally arranged. The 17 chapters are rather headed by names of life-forms, striking organs, and special habitats. As is pointed out in the...
Tipo: Article / Letter to the editor
Ano: 1954
URL: http://www.repository.naturalis.nl/record/524743

Two new Lecythidaceae and two new Apocynaceae from Malaysia
Provedor de dados: 16
Autores: Lütjeharms, W.J.; Ooststroom, S.J. van.
During the year 1936 the first of us made a trip to the island of Enggano (W. coast of Sumatra, Residency of Benkoelen) for the special purpose of collecting Cryptogams. During this trip also a number of Phanerogams could he gathered. The collections made are preserved at the Rijksherbarium at Leiden, duplicates are to be found in the Herbarium at Buitenzorg. The Phanerogams were preliminary identified by Dr. D. F. VAN SLOOTEN Leguminosae, Flacourtiaceae, Combretaceae, Gramineae) and by Dr. C. G. G. J. VAN STEENIS). Afterwards some additional determinations were made by several specialists (BREMEKAMP, HENRARD, JONKER, Miss KOSTER, LAM, J.J. SMITH, UITTIEN) and by the authors. It resulted that a few species proved to be hitherto undescribed. Two of them...
Tipo: Article / Letter to the editor
Ano: 1938
URL: http://www.repository.naturalis.nl/record/525919

Nieuwe vondsten van zeldzame planten in Nederland, hoofdzakelijk in 1974
Provedor de dados: 16
Autores: Mennema, J.; Ooststroom, S.J. van.
A list of new localities of rare species and interesting records of more common species found in the Netherlands mainly during 1974, subdivided in three categories: A. Native species; B. Adventitious species; C. Species escaped from cultivation. In list A comments have been added, where necessary. In list B and C the names of the species, new for the Netherlands, are in bold type.
Tipo: Article / Letter to the editor
Ano: 1975
URL: http://www.repository.naturalis.nl/record/527228

Über eine botanische Handschrift aus dem 15. Jahrhundert
Provedor de dados: 16
Autores: Lütjeharms, W.J.; Ooststroom, S.J. van.
Im Laufe des Jahres 1935 wurde von uns in der Bibliothek des Reiehsherbariums in Leiden eine alte botanische Handschrift gefunden, welche wir ihrer grösstenteils sehr guten Wasserfarbenzeichnungen wegen, hier einer näheren Besprechung unterziehen wollen. Das Manuskript, das wahrscheinlich ursprünglich mit einer Einbanddecke versehen war, wurde lose in einem nicht hinzugehörigen Pergamentband aus dem 18. Jahrhundert angetroffen. Es besteht aus 87 Blättern, numeriert von 36 bis zu 123 einschliesslich; fol. 98 fehlt. Die Höhe der Blätter beträgt 29.2, die Breite 21.2 cm. Das erste Blatt, fol. 36 (r), enthält die Bemerkung: Msstum Botan. Saec. XV, und ist weiter mit einem aufgeklebten Zettel versehen, welcher vermutlich die Unterzeichnung Schrank trägt, und in...
Tipo: Article / Letter to the editor
Ano: 1936
URL: http://www.repository.naturalis.nl/record/525602

Lactuca tatarica (L.) C.A. Mey. in Nederland
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
Lactuca tatarica (L.) C. A. Mey., a blue-flowered Lactuca of the Asiatic and Southeast- European steppe, was found in 1961 as an alien at Rotterdam, where it was more or less naturalized, growing between the basalt-blocks of the embankment of a harbour. Since the early years of the 20th century it has established itself in several places on the coast of the Baltic, where it is becoming part of the natural vegetation. It was also found in a few localities on the coast of England, Scotland and Ireland. As appears now, Lactuca tatarica was already found in 1942 at Doesburg (Gelderland), but was then misidentified as Lactuca perennis.
Tipo: Article / Letter to the editor
Ano: 1962
URL: http://www.repository.naturalis.nl/record/527304

Aanwinsten voor de Nederlandse adventief-flora, 10
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Additions to the adventitious flora of the Netherlands, mainly found in 1966. 1. Osmunda claytoniana L., a native of the eastern part of N. America, has established itself in the park ‘Het Loo’, near Apeldoorn (prov. Gelderland). 2. Polygonum cilinode Michx., also of N. American origin, was found in large quantities near Wageningen (prov. Gelderland). 3. Brassica juncea Czern. var. sabellica (Pleck) Kitamura, a form with laciniate, crispate leaves, occurred as a ruderal at Beverwijk (prov. N. Holland). 4. Heliophila longifolia DC., a native of South Africa, was found near an oil-factory at Zaandijk and on a railway-yard at Zaandam, both in the prov. of N. Holland. 5. The Central and E. European Sisymbrium strictissimum L. was found along a roadside near...
Tipo: Article / Letter to the editor
Ano: 1970
URL: http://www.repository.naturalis.nl/record/527120

Het geslacht Alternanthera Forsk. in Nederland
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
Three species of Alternanthera, viz. A. sessilis (L.) DC., A. pungens H.B.K., and A. peploides (Humb. &amp; Bonpl. ex R. &amp; Sch.) Urb. have been found as aliens in the Netherlands. They may be distinguished as follows: 1. Tepals almost equal in form and size, without excurrent midrib, glabrous, white. .................... 1. A. sessilis 1’. Tepals distinctly unequal in form and size, at least partly with an excurrent midrib, more or less hairy, dirty white. 2. The two largest (abaxial) tepals ca. 4½-5½ mm long, with a spiny point which accounts for about 1/3 of their length. Filaments and pseudostaminodes shortly triangular ....................... 2. A. pungens 2’. The two largest (abaxial) tepals ca. 4 mm long, with short, less spiny point. Filaments...
Tipo: Article / Letter to the editor
Ano: 1961
URL: http://www.repository.naturalis.nl/record/528181

The Convolvulaceae of Malaysia, I
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
This is the first contribution to a series of papers dealing with the Convolvulaceae of Malaysia (Malay Peninsula and Archipelago, Philippines and New Guinea). As far as possible the contributions will be published in accordance with the systematical arrangement of the genera. For a survey on this arrangement I refer to HAULIER'S fundamental work on this matter published in 1893 in the 16th volume of ENOLER'S Botanische Jahrbücher, entitled: ”Versuch einer natürlichen Gliederung der Convolvulaceen auf morphologischer und anatomischer Grundlage“. After all genera will have been published, a determination key will be added, based on the genera of the area under consideration, in which I hope to take especially account of the characters of the Malaysian...
Tipo: Article / Letter to the editor
Ano: 1938
URL: http://www.repository.naturalis.nl/record/525116

Nieuwe vondsten van zeldzame planten in Nederland, hoofdzakelijk in 1965
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
Evenals de vorige lijsten bevat ook deze weer de opgave van een groot aantal nieuwe vindplaatsen van zeldzame plantesoorten benevens enige merkwaardige vondsten van minder zeldzame. Het publiceren van deze lijsten blijkt voor velen een aansporing te zijn om ons van vondsten op de hoogte te stellen, hetzij door toezending van materiaal, hetzij door het doen van opgaven. Wij spreken de hoop uit, dat dit in de toekomst zo moge doorgaan.
Tipo: Article / Letter to the editor
Ano: 1966
URL: http://www.repository.naturalis.nl/record/526551

Boekbesprekingen
Provedor de dados: 16
Autores: Mennema, J.; Ooststroom, S.J. van.
E. E. VAN DER Voo, Tussen Lek en Ronde Venen. — Wetensch. Meded. K.N.N.V. nr. 60, oktober 1965. 60 pag. Prijs ƒ 2,90; voor leden K.N.N.V. en Sticht. Het Zuid-Holl. Landschap ƒ 2,40. In nr. 60 van de voortreffelijke serie Wetenschappelijke Mededelingen van de K.N.N.V. wordt de wordingsgeschiedenis van het landschap en de plantengroei van heden beschreven van het „Groene Hart” van het Utrechts-Zuidhollandse polderland. Deze publicatie bevat een schat aan floristische gegevens, die bovendien vergezeld gaan van vele oecologische bijzonderheden, waardoor deze Wetenschappelijke Mededeling, verkrijgbaar bij het Bureau van de K.N.N.V., Hoogwoud (N.-H.), niet alleen aan de echte polderzwervers, maar aan alle Nederlandse floristen van harte kan worden aanbevolen.
Tipo: Article / Letter to the editor
Ano: 1966
URL: http://www.repository.naturalis.nl/record/527125

Korte mededelingen
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Naar aanleiding van het artikel over Cochlearia pyrenaica DC. (in Gorteria 4(11), 1969, p. 187—188) ontving de redactie de volgende mededeling: Ik werd op het Lontzenerbachdal attent gemaakt door de heer Houtman, die in Enschede een dia-lezing hield en daarbij enthousiast vertelde over deze „botanische schatkamer”. Met Pasen 1968 was ik in Zuid-Limburg en ging natuurlijk even kijken. De Lathraea en de Helleborus die hij vermeldde vond ik niet, wel een prachtige voorjaarsflora zoals op de mooiste plekken van Zuid-Limburg met als „extra’s” veel Narcissus pseudonarcissus en tot mijn verbazing een Cochlearia, die C. pyrenaica bleek te zijn.
Tipo: Article / Letter to the editor
Ano: 1970
URL: http://www.repository.naturalis.nl/record/527213

The Convolvulaceae of Malaysia, VI
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
This paper on the Philippine species of Argyreia forms an addition to that published by the same author in Blumea V, 2, (1943) p. 352—383. As to the description of the genus, the limitation of it against Rivea and the inclusion in it of Lettsomia may be referred to what has been said on p. 353—356 of that publication.
Tipo: Article / Letter to the editor
Ano: 1950
URL: http://www.repository.naturalis.nl/record/524855

Dr P. Jansen (1882—1955)
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
On April 2nd of this year Dr P. Jansen, agrostologist and honorary member of the staff of the Rijksherbarium, suddenly passed away at Amsterdam, 73 years old. Pieter Jansen was born at Rotterdam on January 25th, 1882. Trained to be a teacher, his appointment as such followed in 1900. His study in mathematics soon led to his appointment to a secondary school at Rotterdam and afterwards, in 1912, to the Municipal Training School for Teachers at Amsterdam, of which he filled the post of director from 1936 until his retirement a few years ago.
Tipo: Article / Letter to the editor
Ano: 1955
URL: http://www.repository.naturalis.nl/record/525780

Nieuwe vondsten van zeldzame planten in Nederland, hoofdzakelijk in 1968
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Mennema, J.
A list of new localities of rare and interesting species found in the Netherlands mainly during 1968.
Tipo: Article / Letter to the editor
Ano: 1969
URL: http://www.repository.naturalis.nl/record/527708

The Convolvulaceae of Malaysia, V
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
1a. Parasitic plants with filiform, twining stems, leafless or with minute pale scales. Flowers small, in clusters or short racemes; corolla mostly with 5 episepalous fimbriate scales inside ( Cuscuteae Hall, f.) 1. Cuscuta b. Non-parasitic plants with green leaves 2 2a. Pollen spinulose ( Echinoconiae Hall.f.) 18 b. Pollen not spinulose ( Psiloconiae Hall.f.) 3
Tipo: Article / Letter to the editor
Ano: 1945
URL: http://www.repository.naturalis.nl/record/525032

Aanwinsten voor de Nederlandse adventief-flora, 4
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
This paper contains acquisitions to the adventitious flora of the Netherlands, mainly from the year 1962. 1. Cerastium dichotomum L. (fig. 1, d), a native of the Mediterranean region and of W. Asia, was found at Oostmahorn, prov. Friesland, near a harbour made for the reclamation of the Lauwerszee. 2. Arabis rosea DC., most likely introduced in the dunes near Bloemendaal, prov. N. Holland, with pheasant-food. The species is indigenous in Central and S. Italy, and in Sardinia and Sicily. Differences between this species and the closely related A. muralis Bertol. are discussed. 3. Pavonia urens Cav. (fig. 1, a-c). The var. hirsuta (Hochst. ex Ulbr.) Brenan of this tropical African species was found as an alien near a wool-mill at Tilburg, prov. N. Brabant....
Tipo: Article / Letter to the editor
Ano: 1963
URL: http://www.repository.naturalis.nl/record/526522

The Convolvulaceae of Malesia X. Additional notes on the species from New Guinea with description of a new Merremia
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
After the publication of my paper on the Convolvulaceae of New Guinea (Nova Guinea n.s. 6,1955,1—32) several new collections were made in this island. Some of these contain species up till then unknown from New Guinea, other give a better idea on the distribution within the island of species earlier found there. All specimens are in the Rijksherbarium, Leiden. Merremia emarginata (Burm. f.) Hallier f.; Ooststr., Blumea 3 (1939) 312; Fl. Mal. I, 4 (1953) 444; 1.e. I, 5 (1958) 560. West New Guinea. Merauke, sea level, Aug. 1954, Van Royen 4609.
Tipo: Article / Letter to the editor
Ano: 1972
URL: http://www.repository.naturalis.nl/record/524448

Aanwinsten voor de Nederlandse adventief-flora, 11
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Additions to the adventitious flora of the Netherlands, mainly found in 1967. 1. Beta trigyna Waldst. &amp; Kit. This species, found already in 1924 as an alien near Deventer, now occurred at Wageningen. 2. Securigera securidaca (L.) Degen &amp; Dörfl., a native of the Mediterranean region, occurred spontaneously in a garden at Voorschoten (prov. S. Holland). 3. A seedling of Gossypium spec. was found in the harbour of Rotterdam. 4. Gnaphalium peregrinum Fernald occurred as a weed in the Botanical Garden ‘Cantonspark’ at Baarn. 5. Coix lacryma-jobi L., the plant of the well-known Job’s tears, was collected on a rubbish dump at Beverwijk (prov. N. Holland). 6. Three escapes from cultivation, viz. Oxalis latifolia H.B.K., Hyacinthus azureus (Fenzl) Baker,...
Tipo: Article / Letter to the editor
Ano: 1970
URL: http://www.repository.naturalis.nl/record/526654

Aanwinsten voor de Nederlandse flora, hoofdzakelijk uit 1967-1974
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Mennema, J.; Adema, F.
In 1966 the decease of Th. J. Reichgelt caused a stagnation in the regular publication of acquisitions to the adventitious flora of the Netherlands. Only VAN OOSTSTROOM (1970a and b), ADEMA (1974), and VAN DER MEIJDEN (1975) incidentally continued this series. From 1975 onward the acquisitions to the adventitious flora of the Netherlands — and the new escapes from cultivation — are published in the annual lists with records of rare species. The present publication has the purpose of filling up the gap between 1967 and 1974 and includes: A. Native taxa — a few infraspecific taxa new for the Netherlands; B. Adventitious species; C. Species escaped from cultivation. In the lists B and C the original area of the species has been added.
Tipo: Article / Letter to the editor
Ano: 1977
URL: http://www.repository.naturalis.nl/record/527321

Linaria repens (L.) Mill. x L. vulgaris Mill
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
Linaria repens (L.) Mill. (L. monspessulana (L.) Mill.; L. striata Lamk. &amp; DC.) is bij ons reeds meermalen als adventief gevonden en blijkt zich op enkele plaatsen te handhaven. Dit laatste is bv. het geval te Arnhem, aan de Koningsweg. De soort werd daar in 1952 aangetroffen door Dr. A.G. de Wilde (materiaal is in zijn herb. aanwezig), groeide er waarschijnlijk al langer en komt er nu nog voor. In sept. 1958 werd door de heer C.G. Schippers te Oosterbeek op de groeiplaats aan de Koningsweg tussen exemplaren van L. repens en L. vulgaris een plant gevonden, die hem moeilijkheden bij het determineren gaf, en die hij daarom aan ons opstuurde. Het bleek, dat hij de bastaard van beide soorten had aangetroffen, die tot nu toe nog niet uit Nederland bekend...
Tipo: Article / Letter to the editor
Ano: 1958
URL: http://www.repository.naturalis.nl/record/534185

A new Merremia from New Guinea (Convolvulaceae)
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Planta herbacea, caulibus gracilibus, scandentibus vel prostratis?, sparse patule pilosis, glabrescentibus. Folia breviter petiolata, petiolis 3—5 mm longis, sparse patule pilosis, lanceolata vel lineari-lanceolata vel interdum oblonga, (2.5—)5—7 cm longa, 6—10 mm lata, basi rotundata, apice acuta mucronulata, in marginibus adpresse pilosa, ceterum sparse pilosa vel glabra, nervis lateralibus utrinque 4—6 ascendentibus. Inflorescentiae axillares, pedunculatae, 1-florae; pedunculis 2—4(—6) cm longis, gracilibus, sparse patule pilosis vel glabris; pedicellis apicem versus incrassatis, verruculosis, 6—10 mm longis; bracteis minutis, subulatis. Sepala aequaba vel interiora subbreviora, 12—15 mm longa, exteriora 2 crassiuscula, ovato-lanceolata vel anguste...
Tipo: Article / Letter to the editor
Ano: 1964
URL: http://www.repository.naturalis.nl/record/524641

A monograph of the genus Evolvulus
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
The great difficulties arising in the identification of a number of plants belonging to the genus Evolvulus, which plants were found in several recent collections of Convolvulaceae and were kindly entrusted to me for study, induced me to submit this genus to a further examination. It soon proved how great the prevailing confusion was, both in literature and in the herbaria. Various species were again and again wrongly interpreted and this especially concerns those which had been described by the older authors. Thanks to the invaluable help of a great number of herbaria I was in a position to bring about some order in the genus. Still numerous questions remain unsolved. A close study of living material, preferably on the habitat itself, will often be of...
Tipo: Article / Letter to the editor
Ano: 1934
URL: http://www.repository.naturalis.nl/record/534866

Aanwinsten voor de Nederlandse adventief-flora, 3
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
This paper contains acquisitions to the Netherlands adventitious flora from the year 1961. 1. Amaranthus palmeri S. Wats. This is the second species of the subgenus Acnida (L.) Aellen found in the Netherlands. The first species, A. tamariscinus Nutt. was found in 1953 as a wool-alien. In October 1961 both dioecious species were collected growing together along a roadside near Wageningen, introduced with corn. Differential characters between the two species are given and also a figure of a bract (fig. 1, a), an outer (fig. 1, b) and an inner tepal (fig. 1, c) of a female flower of A. palmeri. A. palmeri occurs in the southwestern United States and in Mexico. 2. Polygonum capitatum Hamilt. ex Don (fig. 1, d) was found in 1960 in a beet field between Wylre...
Tipo: Article / Letter to the editor
Ano: 1962
URL: http://www.repository.naturalis.nl/record/528148

Beiträge zur kenntnis der südamerikanischen Convolvulaceen
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
In seiner Bearbeitung einiger von Glaziou in Brasilien gesammelten Convolvulaceen beschreibt Dammer (I) u.a. zwei neue Prevostea-Arten, P. capitata und P. sphaerocephala, welche der Beschreibung nach auffallende Unterschiede aufweisen mit den anderen Arten dieses Genus. Auch Dammer selbst spricht, wenigstens für P. capitata, schon die Vermutung aus, es handele sich hier um Repräsentanten eines selbständigen Genus oder vielleicht einer neuen Sektion von Prevostea, weil er aufmerkt: „An Genus novum? An sectio nova generis Prevosteae, inflorescentia bene distincta?” Aus einer Untersuchung der beiden Arten, welche die Direktion des Berliner Herbariums mir freundlichst zum Studium überliess, stellte sich nun heraus, dass wir die beiden Arten der Beschaffenheit...
Tipo: Article / Letter to the editor
Ano: 1936
URL: http://www.repository.naturalis.nl/record/535055

Nieuwe vondsten van zeldzame planten in Nederland hoofdzakelijk in 1963
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
A list of new localities of rare species found in the Netherlands mainly during 1963.
Tipo: Article / Letter to the editor
Ano: 1964
URL: http://www.repository.naturalis.nl/record/527763

Aanwinsten voor de Nederlandse adventief-flora, 9
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
Acquisitions to the adventitious flora of the Netherlands, mainly found in 1965. 1. Vicia pseudocracca Bertol., a native of the Mediterranean region, was found on a railway-yard in the harbour of Rotterdam. 2. Verbascum macrocarpum Boiss., from S.W. Asia, occurred as a weed in a garden at Oude Pekela, prov. Groningen, most probably introduced with seeds for the kitchen-garden. 3. Linaria origanifolia (L.) DC., a native of the western part of the Mediterranean region, was found as an alien in the dunes near Oostvoorne, prov. S. Holland. 4. Scrophularia peregrina L., a native of the same region, was found along a roadside near Leiden. 5. Picris sprengeriana (L.) Poir., also from the Mediterranean region, occurred on a railway-yard in Rotterdam-harbour. 6....
Tipo: Article / Letter to the editor
Ano: 1966
URL: http://www.repository.naturalis.nl/record/527053

Cochlearia pyrenaica DC. in Nederland aangetroffen
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Cochlearia pyrenaica DC., known in Belgium from a few localities near the southern border of the Netherlands province of Limburg, was found near Epen (prov. Limburg, Netherlands) in 1967 and 1968 in the neighbourhood of the river Geul, but most probably has disappeared since.
Tipo: Article / Letter to the editor
Ano: 1969
URL: http://www.repository.naturalis.nl/record/527836

De I.V.O.N.-inventarisatie
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
In het eerste nummer van het Correspondentieblad gaf ik een overzicht van het werk van hot I.V.O.N. in het algemeen. Op verzoek van een aantal aspirantmedewerkers wil ik nu nog even iets over de practijk van het inventariseren laten volgen. Als basis voor de inventarisatie wordt, zoals reeds werd medegedeeld, gebruikt de Topografische kaart van Nederland 1 : 50.000. Deze wordt door verticale lijnen (de vouwen van do kaart) en horizontale lijnen (die erop worden getekend) in 40 kwadraten verdeeld van 5 x 5 km. Dit zijn de z.g. uurhokken, de eenheden voor de inventarisatie. Per uurhok worden nl. do daarin voorkomende plantensoorten in het veld genoteerd. Dit noteren geschiedt op gedrukte „hoklijsten”, verkrijgbaar bij het I.V.O.N. p.a. Rijksherbarium, afd....
Tipo: Article / Letter to the editor
Ano: 1957
URL: http://www.repository.naturalis.nl/record/534111

Two new species of Merremia from Fiji, representatives of a new section, Wavula (Convolvulaceae)
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Scandens, ramis teretibus, fistulosis, laevibus, glabris, ad 5 mm diam.; foliis petiolatis, petiolo 5 cm longo, glabro vel praesertim parte superiore pilis nonnullis brevissimis appressis praedito, herbaceis, late ovatis vel orbicularibus, apice abrupte acuminatis vel cuspidatis, acumine acuto mucronulato, 1.5—2 cm longo, basi leviter cordatis, 11—12 cm longis, 10—11 cm latis, glabris vel basi superne ad insertionem petioli pilis nonnullis brevissimis praeditis; nervis primariis utrinque 9—10, curvatis, subtus prominentibus, secundariis pluribus subparallelis, tertiariis subtus reticulatis supra indistinctis; inflorescentiis axillaribus 15— 20 cm longis, pedunculis teretibus, glabris vel basi pilis nonnullis brevissimis praeditis, 10—13 cm longis, apice...
Tipo: Article / Letter to the editor
Ano: 1939
URL: http://www.repository.naturalis.nl/record/525075

Reduction of Gagnepain’s genera Cryptanthela, Dimerodiscus, and Tridynamia (Concolvulaceae)
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
In Notulae Systematicae 14, fasc. 1 (1950) 24—27, Gagnepain published three new genera of Convolvulaceae, viz. Cryptanthela (l.c. p. 24), Dimerodiscus (l.c. p. 25), and Tridynamia (l.c. p. 26), each of them based on a single species. These species are respectively Cryptanthela sericea Gagnep., Dimerodiscus fallax Gagnep., and Tridynamia eberhardtii Gagnep., all found in Indo-China. The types are preserved in the Paris Herbarium. Through the kindness of the Director of the Phanerogamic division of the “Museum National d’Histoire Naturelle” in Paris, I had the opportunity to study the types, with the following result.
Tipo: Article / Letter to the editor
Ano: 1963
URL: http://www.repository.naturalis.nl/record/525623

Nieuwe vondsten van zeldzame planten in Nederland, hoofdzakelijk in 1977
Provedor de dados: 16
Autores: Mennema, J.; Ooststroom, S.J. van.
The list of new localities of rare species and interesting records of more common species found in the Netherlands mainly during 1977, has been subdivided into three categories: A. Netherlands species; B. Adventitious species; C. Species escaped from cultivation. Category A includes the species — also naturalised ones — belonging to the Netherlands flora, as established by the Floristic Council in 1975 and inserted in the Standard List of the Netherlands Flora 1975 (ARNOLDS &amp; VAN DER MEIJDEN, 1976). In list A comments have been added, where necessary; adventitious records of Netherlands species are indicated with adv., escapes from cultivation with verw. In list B and C the names of the species new for the Netherlands, are in bold type.
Tipo: Article / Letter to the editor
Ano: 1979
URL: http://www.repository.naturalis.nl/record/527783

De in Nederland adventieve en gekweekte Physalis-soorten
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
The genus Physalis L. is represented in the Netherlands by 5 adventitious species, viz. P. viscosa L., P. peruviana L., P. virginiana Mill., P. ixocarpa Brot: ex Hornem., and P. angulata L. A sixth species, P. alkekengi L., is found in cultivation and occasionally escapes. The species may be distinguished with the aid of the following key: 1. Corolla white, rotate, distinctly 5-lobed. Fruiting calyx orange or red. 1. P. alkekengi 1’. Corolla yellow, mostly with brown or violet-blue spots, widely funnel-shaped; limb nearly entire. Fruiting calyx yellowish or yellowish green. 2. Plant rather densely covered with stellate hairs. Stems prostrate to ascending ... ......................... 2. P. viscosa 2’. Plant without stellate hairs, but with short simple or...
Tipo: Article / Letter to the editor
Ano: 1962
URL: http://www.repository.naturalis.nl/record/526552

Hermann’s Collection of Ceylon plants in the Rijksherbarium (National Herbarium) at Leyden
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Among the old plant collections in book-form, in the Leyden National Herbarium, there are two large volumes, containing a number of well preserved Ceylon plants. These plants are said to have been collected by PAUL HERMANN in the latter half of the 17th century. PAUL HERMANN¹), afterwards Professor of Botany at the University of Leyden, resided in Ceylon as an ”Ordinary and First Physician“ of the Dutch East Indian Company during the years 1672—1679. Several particularities on his life and on the collections made by him, are to be found in LINNAEUS’S Flora Zeylanica (6), in TRIMEN’S paper entitled ”Hermann’s Ceylon Herbarium and Linnaeus’s Flora Zeylanica“ (8), in BOULGER’S study on the history of Ceylon botany (2) and in ARDAGH’S note on HERMANN’S...
Tipo: Article / Letter to the editor
Ano: 1937
URL: http://www.repository.naturalis.nl/record/526327

Aanwinsten voor de Nederlandse adventief-flora, 7
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
This series of acquisitions to the Netherlands adventitious flora contains descriptions of and notes on 1. Acaena ovalifolia Ruiz &amp; Pav., 2. Amsinckia retrorsa Suksd., and 3. Bidens frondosus L. var. anomalus Porter ex Fernald. Moreover two species are mentioned that escaped from cultivation.
Tipo: Article / Letter to the editor
Ano: 1964
URL: http://www.repository.naturalis.nl/record/526740

Aanwinsten voor de Nederlandse adventief-flora, 1
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
This first part of a series of acquisitions to the Netherlands adventitious flora contains descriptions of 1. Chenopodium nitrariaceum (F. v. Muell.) F. v. Muell. ex Benth., 2. Amaranthus bouchonii Thell., and 3. Brassica carinata A. Braun.
Tipo: Article / Letter to the editor
Ano: 1962
URL: http://www.repository.naturalis.nl/record/526476

Rivea laotica, a new species from Indo-China (Convolvulaceae)
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Differt a speciebus ceteris generis Riveae habitu erecto et praesertim speciei proximae Riveae ornatae sepalis exterioribus margine piano non involute et staminibus circa medium tubi corollae insertis vel paullo inferius. Indo-China. Laos, prov. Vientiane, vicinity of Vientiane, c. 200 m alt., in open Dipterocarpaceae monsoon forest, on sandy lateritic soil; erect shrub, 1.50 m high; flowers white with greenish midpetaline bands, fl. Aug. 20, 1953 (rain-season); vernacular name: phi yik; Vidal 2350 (TL, type; fragments in L). A fruiting specimen from the same locality was collected Oct. 8, 1952; Vidal 1120 (TL; fragments in L).
Tipo: Article / Letter to the editor
Ano: 1957
URL: http://www.repository.naturalis.nl/record/525284

De flora van Rottum
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Reichgelt, Th.J.
Tijdens een bezoek van de Natuurwetenschappelijke Commissie van de voorlopige Natuurbeschermingsraad aan het eiland Rottum op 28 juli 1958 verzamelde Dr. W. Vervoort, Leiden, een 47-tal Phanerogamen. Dit was voor ons aanleiding om na te gaan, wat er tot nu toe over de flora van Rottum in de Nederlandse literatuur gepubliceerd was. Oude gegevens hierover vinden wij in een artikel van L.A. Cohen in het Tijdschrift voor Natuurlijke Geschiedenis en Physiologie 7, 1840, p. 445, getiteld Berigten omtrent de natuurlijke geschiedenis van het eiland Rottum. Daarna volgt in 1870 het bekende werk van P. Holkema, De Plantengroei der Nederlandsche Noordzeeeilanden. De volgende publicatie over de flora van Rottum is van W.W. Schipper, on wel in N.K.A. III,1 , 1897, p....
Tipo: Article / Letter to the editor
Ano: 1959
URL: http://www.repository.naturalis.nl/record/534166

Solanum triflorum Nutt. var. ponticum (Prodan) Borza
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
The correct name for Solanum triflorum Nutt. var. dentatum Ooststr. appears to be S. triflorum Nutt. var. ponticum (Prodan) Borza.
Tipo: Article / Letter to the editor
Ano: 1968
URL: http://www.repository.naturalis.nl/record/528183

Nieuwe vondsten van zeldzame planten in Nederland, hoofdzakelijk in 1976
Provedor de dados: 16
Autores: Mennema, J.; Ooststroom, S.J. van; Mennema, J.
The list of new localities of rare species and interesting records of more common species found in the Netherlands mainly during 1976, has been subdivided into three categories: A. Netherlands species; B. Adventitious species; C. Species escaped from cultivation. In comparison with former lists category A includes the species — also naturalised ones — belonging to the Netherlands Flora, as established by the Floristic Council in 1975 and inserted in the Standard List of the Netherlands Flora 1975 (ARNOLDS &amp; VAN DER MEIJDEN, 1976). In list A comments have been added, where necessary; adventitious records of Netherlands species are indicated with adv., escapes from cultivation with verw. In list B and C the names of the species, new for the Netherlands,...
Tipo: Article / Letter to the editor
Ano: 1977
URL: http://www.repository.naturalis.nl/record/527435

Convolvulaceae
Provedor de dados: 16
Autores: Ooststroom, S.J. van; Hoogland, R.D.
Herbs or shrubs, sometimes parasitic, usually with twining stems, occasionally prostrate or creeping, or erect, very rarely trees, often with milky juice. Leaves mostly spirally arranged, in parasitic species absent or nearly so, usually petioled; petiole sometimes with extra-floral nectaries. Stipules absent, pseudostipules (leaves of axillary shoot) rarely present. Inflorescences mostly cymose, one- to many-flowered, with mostly opposite or subopposite bracts at the base of the cymes or under the solitary flowers; rarely racemose. Flowers generally hermaphrodite, actinomorphic, rarely slightly zygomorphic, usually 5-merous, rarely 4-merous, various in size and colour, often showy. Sepals usually free, imbricate, with quincuncial aestivation, often...
Tipo: Article / Letter to the editor
Ano: 1948
URL: http://www.repository.naturalis.nl/record/532685

Neue und kritische Convolvulaceae aus Peru
Provedor de dados: 16
Autores: Ooststroom, S.J. van.
Beim Studium einer Anzahl in Peru gesammelter Convolvulaceen, welche die Direktionen des Botanischen Gartens und Museums in Berlin—Dahlem und des Field Museums in Chicago mir freundlichst zur Bearbeitung überliessen, fanden sich einige neue Arten, deren Beschreibung ich hier nebst kritischen Bemerkungen folgen lasse.
Tipo: Article / Letter to the editor
Ano: 1933
URL: http://www.repository.naturalis.nl/record/535121