Ovary spindle-shaped, hairy; style filfiform, geniculate, hairy for most of its length, widening slightly at the knee, then filiform and glabrous with a terminal stigma.
Calyx 5-lobed, pilose, the lobes sharply narrowing to terminate in a filiform point, the upper pair connate for up to half their length, not gland-tipped.
Inflorescences many-flowered, dense axillary pseudoracemes; bracts conspicuous, secondary bracts present, bracteoles filiform.
Seeds black, essentially oblong to reniform; rim aril small, funicle remnant persistant.
Leaves pinnately 3-foliolate; leaflets lobed; stipules and stipels present.
Pod oblong, compressed, hairy, dehiscent, 1–2-seeded.
Corolla medium sized; standard elliptic, auriculate.
Stems covered in ferruginous or golden hairs.
Trailing or climbing perennial herb.
Vexillary stamen free.