Evidence for polyphyly in Hemigenia and Microcorys (Lamiaceae: Westringieae)
G. R. GuerinAustralian Centre for Evolutionary Biology and Biodiversity, School of Earth and Environmental Sciences, University of Adelaide, North Terrace, Adelaide, SA 5005, Australia. Email: greg.guerin@student.adelaide.edu.au
Australian Systematic Botany 21(5) 313-325 https://doi.org/10.1071/SB08008
Submitted: 30 January 2008 Accepted: 11 August 2008 Published: 5 December 2008
Abstract
The phylogeny of tribe Westringieae (Lamiaceae: subfamily Prostantheroideae) was examined on the basis of combined morphological and molecular chloroplast trnT–trnF data. The analyses confirm that the tribe is monophyletic, with Prostanthera Labill. sister to the remaining genera. Both Hemigenia R.Br. and Microcorys R.Br. are shown to be polyphyletic, hence changes to generic delimitations are inevitable. Of note, the typical section of Hemigenia is polyphyletic with a large group of Western Australia species placed in a separate clade. A new section of Hemigenia is required to accommodate species currently placed in the typical section which do not belong with the type species, H. purpurea R.Br.
Acknowledgements
I thank Professor Bob Hill, Dr Bill Barker, Penny McLachlan and Ralph Foster. The Department of Environment and Heritage, South Australia, provided part funding for the laboratory work. The State Herbarium of South Australia (AD) was the host institution for the morphological work. The University of Adelaide provided funds and facilities for the project.
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