The phytogeography, ecology and conservation status of Lechenaultia R.Br. (Goodeniaceae) [Western Australia].
1988
Morrison D.A.
Distribution maps for each of the 25 known species of Lechenaultia are presented for 0.5 deg lat. x 0.5 deg long. grid cells, along with discussions of the habitat, flowering period, morphology, and conservation status. Nineteen of the species are endemic (or nearly endemic) to south-western Western Australia. There is a high node of species-richness on the northern sandplains, with a band of moderate species-richness running south-eastwards to the southern sandplains. This band follows the 400 mm annual rainfall isohyet, and corresponds with the kwongan heathlands and the wheatbelt. Similarity coefficients of species presence among the phytogeographic regions of Beard indicate that the Irwin, Darling and Avon Botanical Districts are more similar to each other than they are to the Eyre and Roe Botanical Districts. The Irwin, Roe and Eyre Districts hava a more similar history. Lechenaultia laricina is considered to be an endangered species, with L. juncea, L. longiloba and L. pulvinaris vulnerable, and L. acutiloba and L. superba rare; L. chlorantha and L. ovata are too poorly known for the conservation status to be known. Only 3 of these species are confidently known to be represented in conservation reserves, with 2 of the others thought to be present.
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