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- Title
Molecular phylogenetics and evolution of Orchidinae and selected Habenariinae (Orchidaceae).
- Authors
BATEMAN, RICHARD M.; HOLLINGSWORTH, PETER M.; PRESTON, JILLIAN; YI-BO, LUO; PRIDGEON, ALEC M.; CHASE, MARK W.
- Abstract
Internal transcribed spacer (ITS nuclear rDNA) data have been obtained from 190 terrestrial orchid species, encompassing all genera and the great majority of the widely recognized species of Orchidinae, a heterogeneous selection of species of Habenariinae, and single species of Satyriinae and Disinae (the latter serving as outgroup). The resulting parsimony-based phylogeny reveals 12 well-resolved clades within the Orchidinae, based on Anacamptis s.l. , Serapias , Ophrys , Steveniella –Himantoglossum s.l. (including ‘Comperia’ and ‘Barlia’ , most species being 2n = 36), Neotinea s.l. , Traunsteinera –Chamorchis , Orchis s.s. , Pseudorchis –Amerorchis –Galearis –Neolindleya –Platanthera s.l. (most 2n = 42), Dactylorhiza s.l. , Gymnadenia s.l. (most 2n = 40, 80), Ponerorchis s.l. –Hemipilia s.l. –Amitostigma –Neottianthe , and Brachycorythis (most 2n = 42). Relationships are less clearly resolved among these 12 clades, as are those within Habenariinae; the subtribe appears either weakly supported as monophyletic or as paraphyletic under maximum parsimony, and the species-rich genus Habenaria is clearly highly polyphyletic. The triphyly of Orchis as previously delimited is confirmed, and the improved sampling allows further generic transfers to Anacamptis s.l. and Neotinea s.l. In addition, justifications are given for: (1) establishing Steveniella as the basally divergent member of an appreciably expanded Himantoglossum that incorporates the former genera ‘Barlia ’ and ‘Comperia ’, (2) reuniting ‘Piperia ’ with a broadly defined Platanthera as section Piperia , necessitating ten new combinations, (3) broadening Ponerorchis to include Chusua , and Hemipilia to include single ‘orphan’ species of Ponerorchis and Habenaria , and (4) recognizing ‘Gymnadenia ’camtschatica as the monotypic Neolindleya...
- Subjects
ORCHIDS; PLANT morphology; HOMOPLASY
- Publication
Botanical Journal of the Linnean Society, 2003, Vol 142, Issue 1, p1
- ISSN
0024-4074
- Publication type
Article
- DOI
10.1046/j.1095-8339.2003.00157.x