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Registros recuperados: 45
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Nieuwe vondsten van zeldzame planten in Nederland, hoofdzakelijk in 1965 16
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
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Scleranthus polycarpos L. nieuw voor Nederland 16
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
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Over het voorkomen van Potamogeton trichoides in Nederland 16
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
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De in Nederland adventief gevonden vormen van Scorpiurus muricatus L 16
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
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Enige voor Nederland nieuwe Chenopodiaceae 16
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
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Lactuca tatarica (L.) C.A. Mey. in Nederland 16
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
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Nieuwe vondsten van zeldzame planten in Nederland hoofdzakelijk in 1963 16
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
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De flora van Rottum 16
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
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Nieuwe vondsten van zeldzame planten in Nederland, hoofdzakelijk in 1964 16
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
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De ondersoorten van Cerastium holosteoides Fr. in Nederland 16
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
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Aanwinsten voor de Nederlandse adventief-flora, 4 16
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
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Aanwinsten voor de Nederlandse adventief-flora, 6 16
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
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Nogmaals Vallisneria spiralis L 16
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
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Nadere gegevens over het voorkomen van Chenopodium chenopodioides (L.) Aellen in Nederland 16
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
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Een merkwaardige vindplaats van Juncus alpino-articulatus subsp. atricapillus (Drejer ex Lange) Reichg 16
Reichgelt, Th.J..
The two subspecies of Juncus alpino-articulatus Chaix ex Vill. found in the Netherlands, viz. subsp. atricapillus (Drejer ex Lange) Reichg. and subsp. arthrophyllus (Brenner) Reichg. are restricted there to two distinctly separated areas. The former subspecies occurs only near the coast, in the dunes, the latter far inland near the eastern border of the country. In 1962 the coastal subspecies was found on the border of a pond near Wijchen, i.e. within the area of the inland one. Recently an acceptable explanation of the curious occurrence was found. Near the said pond several species from other parts of the country were planted, a.o. Parnassia from the dunes, and it seems probable that seeds of the Juncus have come there in this way.
Tipo: Article / Letter to the editor
Ano: 1968 URL: http://www.repository.naturalis.nl/record/526938
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Een Nieuw-Zeelandse Epilobium in Nederland verwilderd 16
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
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Het geslacht Alternanthera Forsk. in Nederland 16
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. & Bonpl. ex R. & 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
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Carex divisa Huds 16
Reichgelt, Th.J..
In verband met het hieraan voorafgaande artikel van de heer Van der Ploeg lijkt het mij niet ondienstigs aan te geven, hoe Carex divisa zich van de in ons land voorkomende verwante soorten onderscheidt. Verwarring is alleen mogelijk met een der soorten uit de sectie Arenariae, want buiten deze sectie is C. divisa de enige soort met meer dan een aartje aan de top van de stengel uit het ondergeslacht Vignea, die een ver kruipende wortelstok bezit. Van alle Nederlandse soorten van genoemde sectie verschilt C. divisa – die tot de sectie Divisae behoort – doordat alle aartjes aan de voet vrouwelijk en aan de top mannelijk zijn. Bij de Nederlandse Arenariae zijn of alle aartjes aan de voet mannelijk en aan de top vrouwelijk (C. brizoides, C. praecox, C. ligerica...
Tipo: Article / Letter to the editor
Ano: 1961 URL: http://www.repository.naturalis.nl/record/534276
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De geschiedenis van Rosa dumalis Bechst. in Nederland 16
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
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Aanwinsten voor de Nederlandse adventief-flora, 3 16
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
Registros recuperados: 45
Primeira ... 123 ... Última
 

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