Daviesia crassa is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a compact, dense, glabrous shrub with densely crowded, thick, club-shaped phyllodes, and uniformly yellow flowers.
Daviesia crassa is a compact, dense, glabrous shrub that typically grows to a height of and has spreading to erect and often zig-zagging branchlets. Its leaves are reduced to crowded, thick, club-shaped phyllodes mostly long and wide. The flowers are mostly arranged in groups of three to five in leaf axils on a peduncle long, each flower on a pedicel long with egg-shaped bracts long at the base. The sepals are long and joined at the base, forming a bell-shaped base, the two upper lobes joined for most of their length and the lower three minute. The flowers are uniformly yellow, the standard broadly egg-shaped, long and wide, the wings spatula-shaped and about long and the keel about long. Flowering has been observed in January and the fruit is a flattened, triangular pod about long.[1]
Daviesia crassa was first formally described in 1995 by Michael Crisp in Australian Systematic Botany from specimens he collected near Harrismith in 1979.[2] The specific epithet (crassa) means "thick", referring to the phyllodes.[3]
This species of pea grows in kwongan heath between Wagin and Harrismith in the Avon Wheatbelt biogeographic region of south-western Western Australia.
Daviesia crassa is classified as "Priority Four" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions, meaning that is rare or near threatened.[4]