Prostrate annual or short-lived perennial herb. Leaves mostly 10-15 cm long. Leaflets about 15, elliptic to obovate, the lower ones mostly 1-3 cm long; stipules to 1.5 cm long. Flowers of 2-6 flowers, each 5-6 cm long, scarlet, white or mixed red and white, the standard mostly with a basal black (rarely red) swelling; almost year round. Fruit pod 4-9 cm long, narrowly elliptic to oblong, densely hairy. Syn. Clianthus formosus (G. Don) Ford & Vickery.
S. galegifolia (Andr.) R. Br., Smooth Darling Pea, is a perennial to 1 m tall with 21-29 leaflets per leaf and flower colour varying from white to pink, yellow, purple, orange or red; S. greyana Lindl., Darling Pea, is a perennial to about 1.5 m tall with 17-21 leaflets per leaf and white, pink or purple flowers.
WA, SA, NT, Qld, NSW.
Source: (2002). Fabaceae. In: . Horticultural Flora of South-eastern Australia. Volume 3. Flowering plants. Dicotyledons. Part 2. The identification of garden and cultivated plants. University of New South Wales Press.