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| Bakker, Henk C. den. |
| The identification of Centaurium plants is sometimes difficult, partly because of the occurrence of hybrids, partly because of the insufficient set of diagnostic characters. The new diagnostic characters presented here are: form of the stigma / length of the pedicel / presence of papillae on pedicel and calyx / form of the ‘true’ stem leaves / length of the corolla lobes / relative length of the corolla tube in fruit / size and ornamentation of the seed. With this set of characters a number of deviating herbarium species could be selected. Most probably they must be regarded as hybrid specimens of C. erythraea x littorale or C. littorale x pulchellum, or of backcrosses of these primary hybrids with one of their parents. Remarkably, on the island of... |
| Tipo: Article / Letter to the editor |
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| Ano: 1998 |
URL: http://www.repository.naturalis.nl/record/527308 |
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| Bakker, Henk C. den; Noordeloos, Machiel E.. |
| This paper deals with the generic delimitation of Leccinum and the taxonomic and nomenclatural implications of the phylogenetic results presented in previous papers by Den Bakker et al. (2004a, 2004b). 28S nrDNA data, used in the past to answer questions concerning genus delimitation of Leccinum, are reanalysed. The phylogenetic inferences based on 28S nrDNA largely coincide with Leccinum sensu Singer. The only species that is excluded from Leccinum is L. eximium. At least one truffle-like genus, Chamonixia, should be included in Leccinum. Morphological characters proposed in the past to delimit the genus are discussed in the light of the phylogenetic results. It is concluded that there is no single diagnostic morphological character that unites species of... |
| Tipo: Article / Letter to the editor |
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| Ano: 2005 |
URL: http://www.repository.naturalis.nl/record/532241 |
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