Daviesia pachyloma is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is an erect, bushy or spreading shrub with zigzagging branches, sharply-pointed, narrowly elliptic to linear phyllodes, and yellow and red flowers.
Daviesia pachyloma is an erect, bushy or spreading shrub that typically grows to a height of up to about and has more or less glabrous, zigzagging branches. Its phyllodes are scattered, erect and narrowly elliptic to linear, long and wide with a sharply pointed tip and thickened edges. The flowers are arranged singly in leaf axils on a peduncle up to long, with up to five leaf-like bracts at the base, the rachis up to long. Each flower is on a pedicel long, the sepals long and joined at the base with triangular lobes long. The standard petal is egg-shaped with a notched centre, long and wide, and yellow with a red border and fine red veins, the wings about long and yellow, the keel long and pale creamy yellow. Flowering occurs from March to January and the fruit is a flattened, triangular pod about long.[1]
Daviesia pachyloma was first formally described in 1853 by Nikolai Turczaninow in the Bulletin de la Société Impériale des Naturalistes de Moscou.[2] [3] The specific epithet (pachyloma) means "thick hem", referring to the edge of the phyllodes.[4]
The original publication gave the name Daviesia pachylima, a transcription error from Turczaninow's handwriting. The epithet pachylina has no etymological meaning, and may explain why George Bentham changed the spelling to pachylina ("thick thread") in Flora Australiensis.[5]
This daviesia grows in scattered populations in woodland between Manmanning, Zanthus, Kulin and Holt Rock in the Avon Wheatbelt, Coolgardie, Great Victoria Desert and Mallee biogeographic regions of south-western Western Australia.
Daviesia pachyloma is listed as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions.