Daviesia costata
Daviesia costata is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a straggling, multi-stemmed shrub with scattered, erect, linear phyllodes, and yellow and dark red flowers. Description
Daviesia costata is a straggling, multi-stemmed, glabrous shrub that typically grows up to  high and  wide. Its leaves are reduced to scattered, erect, linear phyllodes  long and  wide, with a prominent mid-rib. The flowers are arranged mostly in groups of three to eight in upper leaf axils on a peduncle  long, each flower on a pedicel  long with sticky bracts about  long at the base. The sepals are  long and joined at the base with five purple-tinged lobes. The standard is yellow with a dark red base, egg-shaped, deeply notched, about  long and  wide. The wings and keel are dark red and about  long. Flowering mainly occurs in September and October and the fruit is a flattened, triangular pod  long. Taxonomy
Davieia costata was first formally described in 1920 by Edwin Cheel in the Journal and Proceedings of the Royal Society of Western Australia based on specimens collected by Max Koch "at Queenswood, on the Preston Valley Railway". The specific epithet (costata) mean "ribbed", referring to the stems. Distribution and habitat
This daviesia usually grows in open forest on sandy soil on flat and sloping sites between Toodyay and the Blackwood River on the Darling Range to Corrigin and Katanning, in the Avon Wheatbelt, Jarrah Forest and Swan Coastal Plain biogeographic regions of south-western Western Australia. Conservation status
Daviesia costata is listed as "not threatened" by the Department of Biodiversity, Conservation and Attractions. References

costata
Rosids of Western Australia
Plants described in 1920
Taxa named by Edwin Cheel