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| Zijlstra, Gea. |
| During vegetation studies in the Netherlands by the author, a strong need was felt for a key to sterile specimens of species belonging to the genera Ononis, Melilotus, Medicago, and Trifolium. The key presented here is intended for all species of these genera that occur naturally in the Netherlands. This key should be regarded as provisional and users are asked to inform the author of corrections and improvements. |
| Tipo: Article / Letter to the editor |
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| Ano: 1972 |
URL: http://www.repository.naturalis.nl/record/527455 |
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| Zijlstra, Gea. |
| Bei einer Untersuchung in einer Anzahl von niederländischen „blauwgraslanden“ (d. h. „blaue Wiesen“, Cirsio-Molinietum, Junco-Molinion) wurde Ctenidium molluscum angetroffen, eine Art, welche in den Niederlanden mehr oder weniger zum Mesobromion gerechnet wird. Untersuchungen an altem Herbarmaterial ergaben, daß die Art im vorigen Jahrhundert auch mehrere Male in den Übergangsgebieten zwischen Pleistozän und Holocän gefunden worden ist, wo es früher u. a. ausgedehnte „blauwgraslanden“ gab, und hier und da auch Gesellschaften aus dem Caricion davallianae. Den alten Funden von Ctenidium molluscum waren oft andere Arten, überwiegend aus dem Caricion davallianae, beigemischt. Literaturangaben aus Grasländern, Mooren und Heiden von Irland bis Österreich... |
| Tipo: Article / Letter to the editor |
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| Ano: 1979 |
URL: http://www.repository.naturalis.nl/record/535093 |
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| Zijlstra, Gea. |
| The author studied the morphology of Blackstonia perfoliata s.l. and compared its variability with that of the other representatives of the genus. She also carried out ecological studies of “Blackstonia perfoliata ssp. serotina” on the Dutch island Voorne and compared her results with those in the literature relating to B. perfoliata in some adjacent regions, notably the Upper Rhine area. On morphological and ecological grounds B. perfoliata ssp. perfoliata and ssp. serotina are to be regarded as two distinct species, B. perfoliata and B. acuminata. |
| Tipo: Article / Letter to the editor |
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| Ano: 1972 |
URL: http://www.repository.naturalis.nl/record/535181 |
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| Grolle, Riclef; Zijlstra, Gea. |
| Gottschea Nees ex Mont. 1843 has been published without generic description. It is valid there by indirect reference to Jungermannia sect. Nemorosae [subsect.] Aligerae Reinw. et al. 1824 only. The type of both is J. aligera Nees et Blume (Art. 22.4). Schistochilaster H. Miller 1970 is a nomenclatural synonym and Paraschistochila Schust. 1963 and Tegulifolium Hässel 1973 are taxonomic ones. 18 new combinations are proposed under Gottschea. |
| Tipo: Article / Letter to the editor |
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| Ano: 1984 |
URL: http://www.repository.naturalis.nl/record/534718 |
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| Zijlstra, Gea. |
| Gradstein et al. (1982) propose to conserve four generic names of Lejeuneaceae: Lopholejeunea (Spruce) Schiffn., Acrolejeunea (Spruce) Schiffn., Trachylejeunea (Spruce) Schiffn. and Taxilejeunea (Spruce) Schiffn., each of which was introduced as a subgeneric name in Lejeunea by Spruce (1884), and subsequently raised to generic rank by Schiffner in his treatment of the Hepaticae in Engler-Prantl (preprint 1893) [see proposals to conserve 675-678 see p. 746]. Although Spruce (l.c.) used for his Lejeunea species a binary nomenclature by combining subgeneric names with specific epithets, it is clear (e.g. text, index) that the binomina are meant as Lejeunea combinations and they are considered as such by most authors (see Gradstein et al. for further details).... |
| Tipo: Article / Letter to the editor |
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| Ano: 1982 |
URL: http://www.repository.naturalis.nl/record/534805 |
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