Morphological and environmental variation within Hibiscus krichauffianus (Malvaceae), and the recognition of two new species, H. verecundus and H. calcareus

Todd G. B. McLay; Robyn M. Barker; David E. Albrecht

doi:10.1071/SB23003

RESEARCH ARTICLE (Open Access)

Previous Contents Vol 36(6)

Morphological and environmental variation within Hibiscus krichauffianus (Malvaceae), and the recognition of two new species, H. verecundus and H. calcareus

Todd G. B. McLay

^A ^B ^C ^* , Robyn M. Barker ^D and David E. Albrecht ^A ^E

+ Author Affiliations

- Author Affiliations

^A Centre for Australian Biodiversity Research, CSIRO, Clunies Ross Street, Canberra, ACT 2601, Australia.

^B Royal Botanic Gardens Melbourne, Birdwood Avenue, South Yarra, Vic. 3141, Australia.

^C School of Biosciences, The University of Melbourne, Vic. 3010, Australia.

^D State Herbarium of South Australia, Adelaide Botanic Garden, Hackney Road, Adelaide, SA 5001, Australia.

^E Australian National Botanic Gardens, Parks Australia, Clunies Ross Street, Acton, ACT 2601, Australia.

^* Correspondence to: todd.mclay@csiro.au

Handling Editor: Joeri Strijk

Australian Systematic Botany 36(6) 457-477 https://doi.org/10.1071/SB23003

Submitted: 7 February 2023 Accepted: 6 November 2023 Published: 15 December 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

The velvet-leaf hibiscus, Hibiscus krichauffianus F.Muell. (Malvaceae subfamily Malvoideae), is predominantly associated with sand dunes in the Australian arid zone but the name is presently also applied to plants occurring in different habitats on the southern edge of the range, and in disjunct locations in Western Australia and eastern Queensland. We investigated the morphological and environmental variation within H. krichauffianus throughout the geographic range. As a result, we have identified two new species, H. verecundus McLay & Albr. and H. calcareus McLay & Albr.; coined a phrase name, H. sp. Belele (D.W.Goodall 3417) for a putative new taxon; and recircumscribed H. krichauffianus. We also assessed material collected when the protologue of H. krichauffianus was published in the late 1850s and selected a lectotype from the original material identified.

Keywords: Hibiscus calcareus, Hibiscus krichauffianus, Hibiscus verecundus, lectotypification, Malvaceae, plant morphology, taxonomy, velvet-leaf hibiscus.

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