An updated classification of Orchidaceae
Por:
Chase M.W., Cameron K.M., Freudenstein J.V., Pridgeon A.M., Salazar G., van den Berg C., Schuiteman A.
Publicada:
1 feb 2015
Resumen:
Since the last classification of Orchidaceae in 2003, there has been major progress in the determination of relationships, and we present here a revised classification including a list of all 736 currently recognized genera. A number of generic changes have occurred in Orchideae (Orchidoideae), but the majority of changes have occurred in Epidendroideae. In the latter, almost all of the problematic placements recognized in the previous classification 11 years ago have now been resolved. In Epidendroideae, we have recognized three new tribes (relative to the last classification): Thaieae (monogeneric) for Thaia, which was previously considered to be the only taxon incertae sedis; Xerorchideae (monogeneric) for Xerorchis; and Wullschlaegelieae for achlorophyllous Wullschlaegelia, which had tentatively been placed in Calypsoeae. Another genus, Devogelia, takes the place of Thaia as incertae sedis in Epidendroideae. Gastrodieae are clearly placed among the tribes in the neottioid grade, with Neottieae sister to the remainder of Epidendroideae. Arethuseae are sister to the rest of the higher Epidendroideae, which is unsurprising given their mostly soft pollinia. Tribal relationships within Epidendroideae have been much clarified by analyses of multiple plastid DNA regions and the low-copy nuclear gene Xdh. Four major clades within the remainder of Epidendroideae are recognized: Vandeae/Podochileae/Collabieae, Cymbidieae, Malaxideae and Epidendreae, the last now including Calypsoinae (previously recognized as a tribe on its own) and Agrostophyllinae s.s. Agrostophyllinae and Collabiinae were unplaced subtribes in the 2003 classification. The former are now split between two subtribes, Agrostophyllinae s.s. and Adrorhizinae, the first now included in Epidendreae and the second in Vandeae. Collabiinae, also probably related to Vandeae, are now elevated to a tribe along with Podochileae. Malaxis and relatives are placed in Malaxidinae and included with Dendrobiinae in Malaxideae. The increased resolution and content of larger clades, recognized here as tribes, do not support the 'phylads' in Epidendroideae proposed 22 years ago by Dressler. © 2015 The Linnean Society of London.
Filiaciones:
Chase M.W.:
Royal Botanic Gardens, Kew, Richmond, Surrey, TW93DS, United Kingdom
School of Plant Biology, The University of Western Australia, Crawley, WA 6009, Australia
Cameron K.M.:
Birge Hall, 430 Lincoln Drive, University of Wisconsin, Madison, WI 53706-1381, United States
Freudenstein J.V.:
Ohio State University Herbarium, Department of Evolution, Ecology and Organismal Biology, 1315 Kinnear Road, Columbus, OH 43212-1157, United States
Pridgeon A.M.:
Royal Botanic Gardens, Kew, Richmond, Surrey, TW93DS, United Kingdom
Salazar G.:
Univ Nacl Autonoma Mexico, Inst Biol, Dept Bot, Mexico City 04510, DF, Mexico
van den Berg C.:
Univsidade Estadual de Feira de Santana, Ciências Biológicas, Av. Transnordestina, s/n, Feira de Santana-BA, 44036-900, Brazil
Schuiteman A.:
Royal Botanic Gardens, Kew, Richmond, Surrey, TW93DS, United Kingdom
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