Year: 2006
Type: article
Abstract: Patterns of leaf petiole and axis vascularization, of pollen grain aperture evolution and exine characters as well as characters of leaf venation of Buxus are discussed in relation to the disjunct global distribution and classification of the genus. The most original taxa are represented in Eastafrica, while three independent branches with clearly separated phyletic groups occur in America, in East Asia and in South Africa. The remarkable parallel evolution of aperture and exine characters on the different continents support this grouping and is interpreted as expression of a common ancestral genetic basis. In contrast the patterns of leaf venation clearly reflect the evolutionary differentiation between and within the continental groups. Cuba represents the evolutionary centre in the New World with the highest number of species and the greatest morphological and phylogenetical diversity, from where only few phyletic groups seem to have migrated to the other Antilles and Central America. Citation: Köhler, E. 2006 [2004-2005]. The Genus Buxus (Buxaceae). Revista Jard. Bot. Nac. Univ. Habana 25-26: 17-23. Published: 21 July 2006.
Author: Köhler, Egon
Institution: Humboldt-Universität zu Berlin
Language: English
Domain: Life Sciences
Open Access status: diamond
OpenAlex ID: W7220211766
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