The Crinum flaccidum (Amaryllidaceae) species complex in Australia
Jamie Simpson
A B * , John G. Conran A , Ed Biffin C , Kor-jent van Dijk A and Michelle Waycott A C
+ Author Affiliations
- Author Affiliations
A School of Biological Sciences, The University of Adelaide, Adelaide, SA 5005, Australia.
B Clinical and Health Sciences, The University of South Australia, Adelaide, SA 5001, Australia.
C Department for Environment and Water, Botanic Gardens and State Herbarium, State Herbarium of South Australia, Adelaide, SA 5001, Australia.
Australian Systematic Botany 35(5) 395-402 https://doi.org/10.1071/SB21038
Submitted: 20 December 2021 Accepted: 12 September 2022 Published: 6 October 2022
© 2022 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
Crinum flaccidum Herb. is widespread across southern and eastern Australia, but suffers from taxonomic uncertainty. This ambiguity is in part due to widespread hybridisation in the genus, but also morphological variability within and among populations. Morphological and molecular analyses of the complex using 24 morphological characters and 59 chloroplast coding and non-coding regions (~50 000 bp) provided support for the separation of C. flaccidum from C. luteolum Traub & L.S.Hannibal ex Traub, with the latter representing populations from the Flinders Ranges and Lake Eyre Basin. Within Crinum flaccidum, there was greater inferred genetic structure at the population level for New South Wales flood plain accessions, compared with South Australian populations from along the Murray River. The greater structure of the South Australian populations is theorised to be attributed to lower seed-dispersal rates leading to lower gene flow.
Keywords: Amaryllidaceae, Crinum, molecular phylogenetics, morphology, New South Wales, South Australia, species complex, taxonomy.
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