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| Welzen, P.C. van; Esser, H.-J.. |
| The most recent phylogenetic analyses of the Malphigiales place the family Rafflesiaceae in the Euphorbiaceae, near the base of the clade. Combining both families is not an attractive option, because the Rafflesiaceae are very recognisable, while the Euphorbiaceae is one of the most polymorphic families around. The solution is to recognize the basal part of the Euphorbiaceae as Peraceae, which will leave the Rafflesiaceae and rest of the Euphorbiaceae untouched. The typical characters of the Peraceae are discussed. Within Malesia the family contains two genera, Chaetocarpus (1 species) and Trigonopleura (3 species). All species are mainly west Malesian taxa. They have as shared typical characters obovate stipules, united stamens and densely hairy fruits.... |
| Tipo: Article / Letter to the editor |
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| Ano: 2013 |
URL: http://www.repository.naturalis.nl/record/579376 |
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| Duistermaat, Helena; Balgooy, M.M.J. van; Welzen, P.C. van; Esser, H.-J.; Middleton, David; Adema, Frits; Veldkamp, J.F.. |
| The International Conference ‘Compositae: Systematics, Biology, Utilization’ held in 1994 inspired the authors, on the suggestion of Dr. K. Ferguson, to publish a book accommodating more general systematic papers on Asteraceae, resulting in the present work. It contains seventeen chapters [in English, French (1), and Spanish (1)], including the Introduction by C. Jeffrey, and is provided with a taxonomic index. Following the Introduction, Jeffrey gives a review of the developments in Asteraceae systematics during the last 20 years, since the conference of 1975. I agree with him that improvements are possible in the use of cladistic analysis in taxonomy, but it seems to me that his review is a bit too negative in this respect. Advances in Compositae... |
| Tipo: Article / Letter to the editor |
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| Ano: 1997 |
URL: http://www.repository.naturalis.nl/record/525946 |
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| Esser, H.-J.. |
| Omalanthus is revised for Malesia and the Solomon Islands. For this region, 13 species without subspecific taxa are accepted, namely O. arfakiensis, O. caloneurus, O. fastuosus, O. giganteus, O. grandifolius, O. longistylus, O. macradenius, O. nervosus, O. novoguineensis, O. populifolius, O. populneus, and O. trivalvis, and, as a new species, O. remotus. In addition to established synonyms, 17 species from Malesia are not accepted any more. The diagnostical importance of a peltate or non-peltate leaf base is especially doubted. Although detailed phylogenetic and biogeographical analyses were not made, the value of the established sections of Omalanthus is questioned. An alternative subdivision unites all Malesian taxa into four subgroups, each with a... |
| Tipo: Article / Letter to the editor |
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| Ano: 1997 |
URL: http://www.repository.naturalis.nl/record/525258 |
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