There's gold in them thar hills! Morphology and molecules delimit species in Xerochrysum (Asteraceae; Gnaphalieae) and reveal many new taxa

Title
There's gold in them thar hills! Morphology and molecules delimit species in Xerochrysum (Asteraceae; Gnaphalieae) and reveal many new taxa
Publication Date
2022-06-09
Author(s)
Collins, Timothy L
Schmidt-Lebuhn, Alexander N
Andrew, Rose L
( author )
OrcID: https://orcid.org/0000-0003-0099-8336
Email: randre20@une.edu.au
UNE Id une-id:randre20
Telford, Ian R H
( author )
OrcID: https://orcid.org/0000-0002-3570-0053
Email: itelford@une.edu.au
UNE Id une-id:itelford
Bruhl, Jeremy J
( author )
OrcID: https://orcid.org/0000-0001-9112-4436
Email: jbruhl@une.edu.au
UNE Id une-id:jbruhl
Type of document
Journal Article
Language
en
Entity Type
Publication
Publisher
CSIRO Publishing
Place of publication
Australia
DOI
10.1071/SB21014
UNE publication id
une:1959.11/52779
Abstract

Golden everlasting paper daisies in the genus Xerochrysum Tzvelev are iconic Australian native plants grown worldwide. The X. bracteatum species complex has been regarded as taxonomically confusing and in need of revision for over 60 years. We applied morphological and molecular analyses to delimit species, detect common ancestry among populations, and identify putative hybrids in the genus Xerochrysum (Asteraceae: Gnaphalieae). Multiple lines of evidence provided strong support for the recognition of new taxa. Here we describe the following 11 new species: X. andrewiae T.L.Collins & J.J.Bruhl, X. berarngutta T.L.Collins & I.Telford, X. copelandii J.J.Bruhl & I.Telford, X. frutescens J.J.Bruhl & I.Telford, X. gudang T.L.Collins & J.J.Bruhl, X. hispidum T.L.Collins & I.Telford, X. macsweeneyorum T.L.Collins, X. murapan T.L.Collins & I.Telford, X. neoanglicum J.J.Bruhl & I.Telford, X. strictum T.L.Collins, and X. wilsonii T.L.Collins, reinstate Helichrysum banksii A.Cunn. ex DC. (as X. banksii (A.Cunn. ex DC.) T.L.Collins & I.Telford), lectotypify X. banksii and X. papillosum (Labill.) R.J.Bayer, and recircumscribe X. bicolor (Lindl.) R.J.Bayer to include X. halmaturorum Paul G.Wilson and some populations of X. bracteatum sens. lat. from mainland South Australia and Victoria. We also provide revised descriptions of all taxa in the genus, their conservation status, a dichotomous key, tables distinguishing closely related taxa and distribution maps.

Link
Citation
Australian Systematic Botany, 35(2), p. 120-185
ISSN
1446-5701
1030-1887
Start page
120
End page
185
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International

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