Daviesia spinosissima is a species of flowering plant in the family Fabaceae and is endemic to the south of Western Australia. It is a shrub with crowded, rigid, sharply-pointed, narrowly triangular phyllodes, and yellow and red flowers.
Daviesia spinosissima is a rigid, glabrous shrub that typically grows to a height of . Its phyllodes are crowded, rigid, vertically compressed and narrowly triangular, long, wide and sharply pointed. The flowers are arranged singly in leaf axils on a pedicel long with bracts about long attached. The sepals are long and joined at the base with lobes about long. The standard petal is broadly egg-shaped with a notched tip, long, wide and yellow. The wings are long and red, the keel long and red. Flowering occurs from October to March and the fruit is a triangular, sharply-pointed, inflated pod long.[1]
Daviesia spinosissima was first formally described in 1844 by Carl Meissner in Lehmann's Plantae Preissianae.[2] [3] The specific epithet (spinosissima) means "very spiny".[4]
This daviesia grows in heath in near-coastal areas of southern Western Australia between Narrikup, Denmark and near Mount Manypeaks in the Esperance Plains, Jarrah Forest and Warren biogeographic regions of south-western Western Australia.
Daviesia spinosissima is listed as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions.