Prostrate or straggling shrub to 1 m tall. Leaves alternate, variable, elliptic to almost round, to 5 cm long, 3 cm wide, thin; margins wavy and with scalloped edge. Flowers mostly 1-2 together, pendulous, to 2 cm long, yellow-green, drying reddish brown, often suffused with pink. Calyx inflated in the lower half. Standard strongly bent back. Fruit pod oblong, about 1 cm long.
Also under this name in the trade is B. melanopetalum F. Muell. which has purpleblack flowers and, in some forms, much narrower leaves. Syn. B. sericeum var. angustifolium (Benth.) Domin. Other flower colour variants are occasionally offered, the taxonomic status of which is uncertain.
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.