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

Four new species of Goodeniaceae from Western Australia, including the smallest species in the family, a putative seed-article elaiosome and possible floral mimicry in Lechenaultia

Russell L. Barrett A B C D E and Matthew D. Barrett A B C
+ Author Affiliations
- Author Affiliations

A Botanic Gardens and Parks Authority, Kings Park and Botanic Garden, West Perth, WA 6005, Australia.

B Western Australian Herbarium, Department of Parks and Wildlife, Locked Bag 104, Bentley Delivery Centre, WA 6983, Australia.

C School of Plant Biology, Faculty Science, The University of Western Australia, Crawley, WA 6009, Australia.

D Australian National Herbarium, Centre for Australian National Biodiversity Research, GPO Box 1600, Canberra, ACT 2601, Australia.

E Corresponding author. Email: russell.barrett@csiro.au

Australian Systematic Botany 27(6) 469-482 https://doi.org/10.1071/SB14035
Submitted: 2 October 2014  Accepted: 1 May 2015   Published: 29 June 2015

Abstract

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.


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