''Tetratheca hispidissima'' is an erect spreading or straggling shrub in the family

Elaeocarpaceae Elaeocarpaceae is a family of flowering plants. The family contains approximately 615 species of trees and shrubs in 12 genera."Elaeocarpaceae" In: Klaus Kubitzki (ed.). ''The Families and Genera of Vascular Plants'' vol. VI. Springer-Verlag: Ber ...

. It is endemic to

Western Australia Western Australia (WA) is the westernmost state of Australia. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to the south, the Northern Territory to the north-east, and South Australia to the south-east. Western Aust ...

. It grows from 0.3 m to 0.8 m high, on sandy, clayey and gravel soils on river flats and on lateritic ridges. Its pink to purple flowers may be seen from September to December. It was first described by

Joachim Steetz Joachim Steetz (12 November 1804 – 24 March 1862) was a German botanist. His herbarium, comprising more than 5000 specimens from over 160 collectors and 30 countries was purchased in 1863 by Victorian Government Botanist Ferdinand von Muelle ...

in 1845. There are no synonyms. The specific epithet, ''hispidissima'', is a superlative derived from the Latin, ''hispidus'', meaning "hispid", "covered with coarse rigid erect hairs or bristles harsh to the touch", and thus describes the plant as being "most hairy".

References

{{Taxonbar, from=Q18009919 hispidissima Oxalidales of Australia Flora of Western Australia Taxa named by Joachim Steetz Plants described in 1845