|
|
|
| Registros recuperados: 114 | |
|
|
| 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 |
| |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
|
| Ooststroom, S.J. van; Reichgelt, Th.J.. |
| Potamogeton trichoides Cham. & 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 |
| |
|
|
| 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 |
| |
|
| |
|
| |
|
| |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
| Registros recuperados: 114 | |
|
|
|
