Molecular data consistently recover a ‘Queensland clade’ of Synostemon (Phyllanthaceae, Phyllantheae) with distinctive floral morphology
Ian R. H. Telford A E , Kanchana Pruesapan B , Peter C. van Welzen C D and Jeremy J. Bruhl AA Botany and N. C. W. Beadle Herbarium, School of Environmental and Rural Science, University of New England, Armidale, NSW 2351, Australia.
B Plant Variety Protection Office, Department of Agriculture, 50 Paholyothin Road, Chatuchak, Bangkok 10900, Thailand.
C Naturalis Biodiversity Center, Botany Department, PO Box 9517, 2300 RA, Leiden, Netherlands.
D Institute of Biology Leiden, Leiden University, PO Box 9505, 2300 RA, Leiden, Netherlands.
E Corresponding author. Email: itelford@une.edu.au
Australian Systematic Botany 27(6) 450-461 https://doi.org/10.1071/SB14034
Submitted: 1 October 2014 Accepted: 29 April 2015 Published: 29 June 2015
Abstract
Molecular analysis of the newly reinstated genus Synostemon F.Muell. (Phyllanthaceae, Phyllantheae), using ITS sequence data from the now densely sampled genus, confirmed that the previously recognised ‘Queensland clade’ consists of Synostemon albiflorus (F.Muell. ex Müll.Arg.) Airy Shaw, S. sphenophyllus Airy Shaw, Sauropus podenzanae (S.Moore) Airy Shaw and the undescribed Synostemon spinescens, sp. nov. ined., the latter being validated here as S. spinosus I.Telford & J.J.Bruhl. Morphological synapomorphies for the clade are as follows: linear, apiculate anthers that are connivent but only basally connate, and thickened, clavate, recurved stigmas. A new combination is provided under Synostemon for Sauropus podenzanae as Synostemon podenzanae (S.Moore) I.Telford & Pruesapan and Sauropus convallarioides J.T.Hunter & J.J.Bruhl is formally placed in synonymy under Synostemon sphenophyllus. Descriptions, distributional data and notes on ecology and conservation status are provided for these species. Phyllanthus albiflorus F.Muell. ex Müll.Arg., the basionym of Synostemon albiflorus, is lectotypified.
Additional keywords: Australia, biodiversity, ITS sequences, new species, Phyllanthus, taxonomy.
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