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Australian Systematic Botany Australian Systematic Botany Society
Taxonomy, biogeography and evolution of plants
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Australian Systematic Botany

Australian Systematic Botany

Volume 38 Number 2 2025

SB24018More links in the daisy chain: morphology and molecules delimit two new species in Coronidium and two in Leucozoma (Asteraceae; Gnaphalieae)

Timothy L. Collins 0000-0002-4055-9381, Alexander N. Schmidt-Lebuhn 0000-0002-7402-8941, Rose L. Andrew 0000-0003-0099-8336, Ian R. H. Telford 0000-0002-3570-0053 and Jeremy J. Bruhl 0000-0001-9112-4436

Photographs showing Australian paper daisies, Leucozoma (left) and Coronidium (right).

Australian paper daisies have diversified in isolation over the past 20 million years. We studied populations of Coronidium and Leucozoma from across their ranges. Molecular analyses and comparison with morphology recovered both broadly distributed, morphologically variable species and narrow endemics, including four new species. The new insights into biodiversity, ecology, distribution and conservation status will enable conservation and land managers to better protect Australia’s natural heritage, and the broader community to enjoy these remarkable paper daisies. (Photographs by J. J. Bruhl.)

SB24009A framework phylogeny of the diverse guinea-flowers (Hibbertia, Dilleniaceae) using high-throughput sequence data

Timothy A. Hammer 0000-0003-3816-7933, Ed Biffin 0000-0002-6582-716X, Kor-jent van Dijk 0000-0002-6521-2843, Kevin R. Thiele 0000-0002-6658-6636 and Michelle Waycott 0000-0002-0822-0564

Photograph of Hibbertia procumbens (Dilleniaceae) flowers showing the radial floral symmetry typical of the subgenus.

Our study, conducted as part the Genomics for Australian Plants initiative, presents the first phylogenomic study of the very diverse genus Hibbertia using hundreds of nuclear and plastid gene sequences. The subject of significant recent taxonomic work, this study delivers new insights into the evolution and relationships between Hibbertia species. Results identify support for 14 novel clades in the genus and highlight areas of phylogenetic uncertainty, which will be used as a springboard for future systematic studies into the evolution of this remarkable genus. (Photograph by T. A. Hammer.)

This article belongs to the collection: Genomics for Australian plants.

Australia has a rich seaweed flora with many unique but poorly known species, genera and families. We compare results of an early 1970s anatomical study of one of the families with what modern molecular methods indicate about the same suite of genera. Previously considered to be a closely related group (monophyletic), we conclude that the family is polyphyletic (separate families). The study highlights how new insights from advanced technological applications can improve often intuitive taxonomic classification based on morphological characteristics.

Committee on Publication Ethics

Best Student Paper

The Best Student Paper published in 2023 has been awarded to Harvey K. Orel.

Plant Systematics and Biogeography in the Australasian Tropics

Special Issues vol. 31 nos 5 & 6, vol. 32 nos 2 & 3 and vol. 32 no. 4 form special editions on Plant Systematics and Biogeography in the Australasian Tropics containing Part 1, Part 2 & Part 3, respectively.

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