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| Prud’homme van Reine, W.F.; Lokhorst, G.M.. |
| In modern handbooks the development of plant systematica is given as occurring in four overlapping phases: the pioneer (or exploratory) phase, the consolidation phase, the biosystematic phase, and the encyclopaedic phase. In systematic phycology research is still largely in the pioneer phase, with scattered attempts to reach the second, third, or even fourth phase. In many cases in phycology the biosystematic phase has to precede the consolidation phase. Knowledge of algae (growing mainly in marine or freshwater environments, but also occurring in soils or snow and on rocks or trees) is quite scanty in most parts of the world, and even for taxa that are supposed to be well known, the information is often but fragmentary. The encyclopaedic phase is for most... |
| Tipo: Article / Letter to the editor |
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| Ano: 1979 |
URL: http://www.repository.naturalis.nl/record/525786 |
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| Lokhorst, G.M.. |
| In this fourth report on the taxonomy of Ulothrix Kützing a new classification of the marine and brackish-water species in western Europe is proposed. Comparative studies on field collections, uni-algal cultures, herbarium collections and sections prepared for electron microscopy lead to the recognition of three marine species, viz. Ulothrix speciosa (Carmichael ex Harvey in Hooker) Kützing, U. flacca (Dillwyn) Thuret in Le Jolis, and U. palusalsa Lokhorst (nov. nom.), and two brackish-water species, viz. U. implexa (Kützing) Kützing and U. subflaccida Wille. The vegetative anatomy, the life history, the fine structure of the vegetative thallus and the distributional pattern in nature are amply discussed. Salient, reliable characters proved to be, e.g.,... |
| Tipo: Article / Letter to the editor |
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| Ano: 1978 |
URL: http://www.repository.naturalis.nl/record/525065 |
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| Lokhorst, G.M.. |
| Specimens of the freshwater red alga Thorea ramosissima were recently found at two nearby localities in the river Meuse in the Netherlands. The plants were epilithically growing 10-30 cm below the water surface. A description of the thallus of this alga is given, completed with some taxonomic remarks. It is concluded that Thorea ramosissima has a Central European to Mediterranean distribution on the European continent. |
| Tipo: Article / Letter to the editor |
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| Ano: 1994 |
URL: http://www.repository.naturalis.nl/record/527361 |
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