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  • 11
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    Vindplaatsen van stinseplanten in Friesland (1969)
    In:  Gorteria: tijdschrift voor de floristiek, de plantenoecologie en het vegetatie-onderzoek van Nederland vol. 4 no. 12, pp. 203-208
    Details
    Publication Date: 2024-01-12
    Description: A new list of localities of plant species found especially in old countryseats (\xe2\x80\x9cstinsen\xe2\x80\x9d) in the Netherlands province of Friesland.
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 12
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    Potamogeton x sudermanicus Hagstr\xc3\xb6m, de vermoedelijke bastaard van P. acutifolius Link en P. berchtoldii Fieber, in Nederland gevonden (1987)
    In:  Gorteria: tijdschrift voor de floristiek, de plantenoecologie en het vegetatie-onderzoek van Nederland vol. 13 no. 7, pp. 173-176
    Details
    Publication Date: 2024-01-12
    Description: In September 1984 and in August and September 1985 the supposed hybrid between Potamogeton acutifolius Link and P. berchtoldii Fieber (P. X sudermanicus Hagstr\xc3\xb6m) was found in a ditch near Meppel in the Dutch province of Overijssel. This hybrid was not yet known from the Netherlands.
    Repository Name: National Museum of Natural History, Netherlands
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  • 13
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    Carex X bakkerana (= Carex acutiformis Ehrh. X C. rostrata Stokes) nieuw voor de wetenschap (1981)
    In:  Gorteria: tijdschrift voor de floristiek, de plantenoecologie en het vegetatie-onderzoek van Nederland vol. 10 no. 10, pp. 173-179
    Details
    Publication Date: 2024-01-12
    Description: In 1975, a sterile Carex-hybrid was collected in the vicinity of Heerenveen (prov. of Friesland). At first sight it resembled Carex X beckmanniana Figert ( C. riparia Curt. X C. rostrata Stokes). Further study, however, reveiled that the hybrid shows affinity to C. acutiformis Ehrh. instead of C riparia, and is intermediate between the supposed parents C. acutiformis and C. rostrata, as shown in the table and the figures. This hybrid has not been found in the Netherlands before nor, as far as we know, elsewhere in Europe. The name Carex X bakkerana is proposed in honour of the late Prof. Dr. D. Bakker.
    Repository Name: National Museum of Natural History, Netherlands
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  • 14
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    Een stabiele grens: Caltha palastris L. in Friesland (1971)
    In:  Gorteria: tijdschrift voor de floristiek, de plantenoecologie en het vegetatie-onderzoek van Nederland vol. 5 no. 7/10, pp. 198-201
    Details
    Publication Date: 2024-01-12
    Description: Round about 1930 it was presumed that the imminent closure of the \xe2\x80\x98Zuiderzee\xe2\x80\x99 with the resultant change from salt to fresh water might well affect the boundaries of Caltha palustris in the coastal area of the province Friesland. It was thought that inside the dikes Caltha would invade the regions that had previously been too saline for its growth. As many localities as possible were carefully mapped. Now, forty years after the first investigation was carried out the boundary of the area covered by Caltha appears practically unchanged. Very different, on the other hand, is the situation outside the dikes where many new localities have been found on the newly claimed land.
    Repository Name: National Museum of Natural History, Netherlands
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  • 15
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    Carex pseudocyperus L. X C. rostrata Stokes nieuw voor Nederland (1976)
    In:  Gorteria: tijdschrift voor de floristiek, de plantenoecologie en het vegetatie-onderzoek van Nederland vol. 8 no. 5, pp. 85-88
    Details
    Publication Date: 2024-01-12
    Description: The sterile hybrid Carex pseudocyperus L. X C. rostrata Stokes, new for the Netherlands, was discovered along a ditch near Gorredijk-Kortezwaag in the province of Friesland, in a large population of C. pseudocyperus. C. rostrata was found in the neighbourhood. The hybrid differs from C. pseudocyperus in, among other things, the glaucous leaves and the only slightly pendulous spikes. Compared with C. rostrata the hybrid has much flatter and wider leaves and the utricules gradually taper into the beak (fig. 2, a). The distinctly awned female glumes show the influence of C. pseudocyperus fig- 2,b).
    Repository Name: National Museum of Natural History, Netherlands
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  • 16
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    Korte mededelingen (1983)
    In:  Gorteria: tijdschrift voor de floristiek, de plantenoecologie en het vegetatie-onderzoek van Nederland vol. 11 no. 12, pp. 290-291
    Details
    Publication Date: 2024-01-12
    Description: Tragopogon porrifolius L. X T. pratensis L. ook in bloeitijd intermediair. Sinds de ontdekking van de hybride Tragopogon porrifolius L. x T. pratensis L. subsp. pratensis bij Wommels, Fr. (Gorteria 1, 1963, p. 99) is bijna elk jaar deze fraaie bastaard hier aangetroffen. Het betreft steeds dezelfde berm van een oude slagtedijk. Reeds eerder werd de aandacht gevestigd op het intermediaire karakter van de bastaard (bloemkleur, hoofdjessteel). Deze zomer viel mij op dat de bastaard ook in bloeitijd intermediair is. T. pratensis begint ongeveer een maand eerder (mei) te bloeien dan T. porrifolius (juni); T. porrifolius x T. pratensis blijkt hier tussenin te zitten.\nIn 1983 noteerde ik op de bovengenoemde slagtedijk de eerste open bloemen van T. pratensis op 20 mei. De eerste open bloemen van de hybride zag ik op 6 juni, terwijl T. porrifolius pas na 10 juni begon te bloeien.
    Repository Name: National Museum of Natural History, Netherlands
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  • 17
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    De bastaard van Senecio vernalis Waldst. & Kit. en S. vulgaris L. wederom gevonden (1985)
    In:  Gorteria: tijdschrift voor de floristiek, de plantenoecologie en het vegetatie-onderzoek van Nederland vol. 12 no. 8/9, pp. 216-216
    Details
    Publication Date: 2024-01-12
    Description: Two wild records of Senecio x pseudovernalis Zabel are mentioned from the Netherlands, one from 1950 in the province of Zeeland (leg. A. de Visser) and one from 1984 in the province of Friesland. In 1941 the hybrid was also found in Wijchen, in the garden of a local botanist.
    Repository Name: National Museum of Natural History, Netherlands
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  • 18
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    Tragopogon porrifolius L. X T. pratensis L. in Friesland (1963)
    In:  Gorteria: tijdschrift voor de floristiek, de plantenoecologie en het vegetatie-onderzoek van Nederland vol. 1 no. 9, pp. 99-100
    Details
    Publication Date: 2024-01-12
    Description: Up to now hybrids of Tragopogon porrifolius L. and the subspecies pratensis and orientalis of T. pratensis L. were only known in the Netherlands from botanical gardens where they came up spontaneously between the parents. The author mentions the first wild occurrence in our country of the hybrid of T. porrifolius and T. pratensis subsp. pratensis along a dike near Wommels, prov. Friesland, where it was discovered by one of his pupils, Mr. Posthuma. Moreover a survey of the distribution of T. porrifolius in Friesland is given.
    Repository Name: National Museum of Natural History, Netherlands
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  • 19
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    Een adventiefterrein in Friesland (vervolg) (1957)
    In:  Correspondentieblad ten dienste van de floristiek en het vegetatie-onderzoek van Nederland vol. 4 no. 1, pp. 46-47
    Details
    Publication Date: 2024-01-12
    Description: In 1956 vonden wij op Let vuilverwerkingsterrein der gemeente Leeuwarden onder Wartena (zie Corr. bl. no. 1, p. 5) opnieuw een vrij groot aantal adventieven. Hieronder volgt een lijst van de planten, die werden aangetroffen. Niet weer opgenomen zijn de soorten, die reeds in 1955 werden gevonden.
    Repository Name: National Museum of Natural History, Netherlands
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  • 20
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    Een adventiefterrein in Friesland (1958)
    In:  Correspondentieblad ten dienste van de floristiek en het vegetatie-onderzoek van Nederland vol. 8 no. 1, pp. 86-87
    Details
    Publication Date: 2024-01-12
    Description: In 1957 waren wij weer herhaaldelijk in de gelegenheid het adventiefterrein \xe2\x80\x9cde Dwinger\xe2\x80\x9d aan de Langesloot tussen Wartena en Eernewoude te het laatst op 1 november, samen met M.T. Jansen. Hier volgt een opgave van de nieuw waargenomen planten (zie Corr.bl. no. 1 en 4). Buiten adventieven was het aantal verwilderde kultuurplanten vrij groot. De heren dr. S.J. van Ooststroom en Th.J. Reichgelt waren weer bereid het materiaal te controleren, terwijl de heer G. Bakker, direkteur der Gemeentereiniging Leeuwarden, opnieuw toestemming verleende het terrein te betreden.
    Repository Name: National Museum of Natural History, Netherlands
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