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| Haperen, A.M.M. van; Kogel, T.J. de. |
| Hordeum jubatum and Parentucellia viscosa have been found in the Netherlands since the beginning of this century. However they do not belong to the Standardlist of the Netherlands flora. Both species have settled on sandy flats in the recently closed estuaries (Grevelingen, Veerse Meer) in the South-west Netherlands. It is not clear if this occurred spontaneously or was induced by man. However it is certain, that the species have been able to maintain themselves in this area for almost ten years and colonize new places as well. Hordeum jubatum is found mainly in open vegetation on desalinating soils. This vegetation belongs mainly to mixtures of the alliance Agropyro-Rumicion crispi and halophytes. There are clear indications that H.jubatum is not always... |
| Tipo: Article / Letter to the editor |
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| Ano: 1981 |
URL: http://www.repository.naturalis.nl/record/526773 |
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| Willems, J.H.; Haperen, A.M.M. van. |
| The authors report a find of Orchis simia Lamk. (Monkey-Orchid) on a hillside covered by limestone-grassland at Cadier-en-Keer in the extreme south of the Dutch province of Limburg, a few km east of Maastricht (fig. 4). The station is a south-facing hillside with calcareous deposits of Upper Senone age at varying depth in the subsoil. Up to the second world-war the area was extensively grazed by sheep; the vegetation was then open limestone-grassland. The area occupied by this vegetation is rapidly decreasing by intentional and spontaneous reafforestation. In 1972 Orchis simia was found in one of the open places left. In 1973 the same plant flowered again, producing even more flowers on a more robust stem than in the preceding year. The station in southern... |
| Tipo: Article / Letter to the editor |
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| Ano: 1974 |
URL: http://www.repository.naturalis.nl/record/528067 |
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