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Nicotra A.B.,Australian National University | Chong C.,Australian National University | Chong C.,University of Connecticut | Bragg J.G.,Australian National University | And 5 more authors.
Molecular Ecology | Year: 2016

Species delimitation has seen a paradigm shift as increasing accessibility of genomic-scale data enables separation of lineages with convergent morphological traits and the merging of recently diverged ecotypes that have distinguishing characteristics. We inferred the process of lineage formation among Australian species in the widespread and highly variable genus Pelargonium by combining phylogenomic and population genomic analyses along with breeding system studies and character analysis. Phylogenomic analysis and population genetic clustering supported seven of the eight currently described species but provided little evidence for differences in genetic structure within the most widely distributed group that containing P. australe. In contrast, morphometric analysis detected three deep lineages within Australian Pelargonium; with P. australe consisting of five previously unrecognized entities occupying separate geographic ranges. The genomic approach enabled elucidation of parallel evolution in some traits formerly used to delineate species, as well as identification of ecotypic morphological differentiation within recognized species. Highly variable morphology and trait convergence each contribute to the discordance between phylogenomic relationships and morphological taxonomy. Data suggest that genetic divergence among species within the Australian Pelargonium may result from allopatric speciation while morphological differentiation within and among species may be more strongly driven by environmental differences. © 2016 John Wiley & Sons Ltd.

Bean A.R.,Queensland Herbarium | Miller C.H.,Center for Australian National Biodiversity Research
Austrobaileya | Year: 2011

The endemic Australian genus Nyssanthes is revised, with the recognition of four species, N. erecta R.Br., N. diffusa R.Br., N. impervia A.R. Bean sp. nov. and N. longistyla C.H.Mill. sp. nov. All species are illustrated, and distribution maps provided. Notes for each species are given on conservation status, distribution and habitat, and an identification key is presented.

Christine Cargill D.,Center for Australian National Biodiversity Research | Christine Cargill D.,Khan Research Laboratories | Milne J.,Royal Botanic Gardens
Polish Botanical Journal | Year: 2013

A new genus Austroriella Cargill and Milne and species Austroriella salta Milne and Cargill within the family Riellaceae is described. Known only from the type location at the margins of a saline lake in Western Australia it is the first record and description of a terrestrial species within this typically aquatic family. Female plants are typical of the family with a single reduced wing bearing a row of archegonia; male plants are not typical and are naviculate in form enclosing several rows of enclosed antheridia not unlike the males of Sphaerocarpos. Unlike Sphaerocarpos this species does bear oil bodies. Differences and affinities are also outlined briefly with closely related genera within the order Sphaerocarpales.

Barrett R.L.,Botanic Gardens and Parks Authority | Barrett R.L.,Bentley Delivery Center | Barrett R.L.,University of Western Australia | Barrett R.L.,Center for Australian National Biodiversity Research | And 3 more authors.
Australian Systematic Botany | Year: 2014

Goodenia cravenii R.L.Barrett & M.D.Barrett, G. Maretensis R.L.Barrett, Goodenia heterotricha M.D.Barrett & R.L.Barrett and Lechenaultia mimica M.D.Barrett & R.L.Barrett are described as new species from the northern Kimberley region of Western Australia. Goodenia cravenii (subg. Goodenia sect. Amphichila DC.) is the smallest species known in the family. Goodenia maretensis (subg. Goodenia sect. Goodenia subsect. Ebracteolatae K.Krause) is known only from the Maret Islands group in the Bonaparte Archipelago. Goodenia heterotricha (subg. Goodenia sect. Goodenia subsect. Ebracteolatae K.Krause) was discovered during a Bush Blitz survey on Home Valley Station in May 2014. Modified keys to these species are presented. Lechenaultia mimica (sect. Latouria (Endl.) Benth.) is known only from the Harding Range and may represent the first instance of floral mimicry to be reported in the genus Lechenaultia. Seed article micromorphology in tropical annual species of Lechenaultia R.Br. is discussed and a key to species is provided. A putative elaiosome, the first report for the genus, was observed on the seed article of L. ovata. All species described here are of conservation priority and are illustrated. © 2015 CSIRO.

Reiter N.,Wimmera Catchment Management Authority | Clements M.,Center for Australian National Biodiversity Research | Vlcek K.,CSIRO
Muelleria | Year: 2013

This paper examines all known populations of Pterostylis xerophila M.A.Clem. within Victoria based on accurate surveys of known habitat carried out in October 2009-2012, collecting floristic and environmental information relevant to community ecology and condition.Twelve sites were surveyed for P. xerophila. Populations of P. xerophila were confirmed only in the MurraySunset National Park. Populations in Semi-arid Parilla Woodland in the northern Murray-Sunset National Park, Mallanbool Fauna and Flora Reserve (FFR) and Wemen FFR previously thought to be P. xerophila were determined by the authors to be P. lingua M.A.Clem., a new species for Victoria.

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