About Daviesia horrida Preiss ex Meisn.
Daviesia horrida Preiss ex Meisn. is a glabrous, spreading shrub that usually reaches a height of 0.5 to 1.8 metres (1 foot 8 inches to 5 feet 11 inches). It has rigid, spiny, often leafless branchlets. When phyllodes are present, they are narrowly elliptic to linear, 18 to 130 millimetres (0.71 to 5.12 inches) long and 1.5 to 20 millimetres (0.059 to 0.787 inches) wide. Flowers are arranged in a raceme of three to ten blooms, growing in leaf axils. The raceme has a peduncle around 1 millimetre (0.039 inches) long, and a rachis 1 to 20 millimetres (0.039 to 0.787 inches) long. Each individual flower sits on a pedicel 1 to 7 millimetres (0.039 to 0.276 inches) long, with overlapping bracts around 1.7 millimetres (0.067 inches) long at the base of the pedicel. The sepals are 4.5 to 5.0 millimetres (0.18 to 0.20 inches) long, joined at the base and divided into five equal lobes. The standard petal is broadly elliptic, 8 to 9 millimetres (0.31 to 0.35 inches) long, orange with a dark red centre. The wing petals are 6.5 to 7.5 millimetres (0.26 to 0.30 inches) long and dark red, and the keel petal is 5 to 6 millimetres (0.20 to 0.24 inches) long and dark red. Flowering takes place from July to September. The fruit is a flattened, triangular, beaked pod that is 15 to 18 millimetres (0.59 to 0.71 inches) long. This species, commonly called prickly bitter-pea, grows in the shrubby understorey of forest on hilly terrain. It occurs between Bindoon, Busselton and the Pallinup River, within the Esperance Plains, Jarrah Forest, Swan Coastal Plain and Warren biogeographic regions of south-western Western Australia.
