Nine new species of Australian Nicotiana (Solanaceae)
Mark W. Chase
A B * , Maarten J. M. Christenhusz B , Luiz A. Cauz-Santos C , Felipe Nollet D , Jeremy J. Bruhl E , Damien D. Andrew E , Ruth Palsson E , Richard W. Jobson F , Guy M. Taseski G and Rosabelle Samuel C
A Department of Environment and Agriculture, Curtin University, Bentley, WA 6102, Australia.
B Jodrell Laboratory, Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3DS, UK.
C Department of Botany and Biodiversity Research, University of Vienna, Rennweg 14, A-1030 Vienna, Austria.
D Departamento de Biologia, Universidade Federal Rural de Pernambuco, 52171-900 Recife, Pernambuco, Brazil.
E Department of Botany and N.C.W. Beadle Herbarium, University of New England, Armidale, NSW 2351, Australia.
F National Herbarium of New South Wales, Narellan Road, Mount Annan, NSW 2567, Australia.
G School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW 2052, Australia.
Australian Systematic Botany 36(3) 167-205 https://doi.org/10.1071/SB23001
Submitted: 24 January 2023 Accepted: 1 June 2023 Published: 7 July 2023
© 2023 The Author(s) (or their employer(s)). Published by CSIRO Publishing. This is an open access article distributed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND)
Abstract
Nine new species in Australian Nicotiana section Suaveolentes are described, including N. clarksonii M.W.Chase & Christenh., N. erytheia M.W.Chase & Christenh., N. latifolia M.W.Chase & Christenh., N. latzii M.W.Chase, R.W.Jobson & Christenh., N. gibbosa M.W.Chase, D.D.Andrew & J.J.Bruhl, N. olens M.W.Chase & Christenh., N. praecipitis M.W.Chase & K.Durham, N. karara M.W.Chase & Christenh. and N. bungonia M.W.Chase & Taseski. Some have been known from herbarium specimens for a long time, but their distinction from other species concepts was unsuspected until DNA studies showed their divergent nature. Others are known from one or only a few new localities. All are morphologically and genetically distinct from their close relatives. Increased sampling of populations in our molecular studies has led us to the conclusion that the widespread, recently described species N. insecticida is a species complex, comprising as many as six genetically distinct taxa, one of which includes material from the type locality of N. hesperis. Here, we describe a new name, N. erytheia, for all material we previously assigned to N. hesperis that is phylogenetically distinct from that of the type locality. To make the relationships of the new species clearer, we provide a tree produced by analysis of nuclear (RADseq) DNA data.
Keywords: cryptic species, Nicotiana hesperis, Nicotiana megalosiphon, Nicotiana rosulata, Nicotiana simulans, Nicotiana suaveolens, river drainage basins, wild tobaccos.
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