Transfer of Cotula alpina to the genus Leptinella (Asteraceae: Anthemideae)

Alexander N. Schmidt-Lebuhn; Alicia Grealy

doi:10.1071/SB23012

RESEARCH ARTICLE (Open Access)

Contents Vol 37(1)

Transfer of Cotula alpina to the genus Leptinella (Asteraceae: Anthemideae)

Alexander N. Schmidt-Lebuhn

^A ^* and Alicia Grealy ^A

+ Author Affiliations

- Author Affiliations

^A Centre for Australian National Biodiversity Research (a joint venture of Parks Australia and CSIRO), Clunies Ross Street, Canberra, ACT 2601, Australia.

^* Correspondence to: alexander.s-l@csiro.au

Handling Editor: Joeri Strijk

Australian Systematic Botany 37, SB23012 https://doi.org/10.1071/SB23012

Submitted: 16 May 2023 Accepted: 14 December 2023 Published: 12 January 2024

© 2024 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

Tribe Anthemideae (Asteraceae) is represented in Australia by only nine indigenous species of Cotula and Leptinella. The generic placement of Cotula alpina (Hook.f.) Hook.f. is considered problematic, because it shares the stoloniferous and scapose habit of Leptinella, but lacks corollas in female florets, a trait traditionally considered defining of Cotula. A previous phylogenetic analysis of Leptinella using ITS and chloroplast data showed that the species nested in that genus, but some uncertainty remained because of incomplete sequence data and missing cytological information, and no taxonomic change was made. Here, we use target-capture data from three different sequencing initiatives to reconstruct a phylogeny of Australian native and introduced Anthemideae to resolve this outstanding question. We confirm previous results with a high degree of support and formally transfer Cotula alpina to the genus Leptinella. A lectotype is selected for the basionym, Ctenosperma alpinum Hook.f.

Keywords: Asteraceae, Australian flora, Compositae, Cotula, Cotuleae, Leptinella, phylogenetics, taxonomy, typification.

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