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Seeds greyish-or deep red-brown, sometimes speckled with violet or darker brown, 4–6 × (2)3–4.5 × 2–2.5 mm, oblong or pyriform, usually strongly compressed, arranged with longest dimension across the pod; rim aril minute with a conspicuous remnant cartilaginous funicle.
Inflorescences axillary or terminal, 2.5–24 cm long; flowers subsessile in fascicles on cushion-like short shoots; bracts and bracteoles minute, under 1 mm long.
Pods 2.2–7(9) × 0.8–1.5 cm, oblong or linear-oblong, compressed, smooth, sparsely to densely appressed-pubescent, the indumentum greyish or rust-coloured.
Calyx 1.5–3 mm long, subtruncate, shallowly lobed or distinctly toothed, appressed-pubescent, indumentum rust-coloured to silvery.
Corolla white, cream, yellow, orange, carmine-red, to purple, usually pale pink, drying yellowish, 8–15 mm long.
Stems glabrous to densely spreading-pubescent to appressed-pubescent, the indumentum greyish or rust-coloured.
Subshrub to liane prostrate to twining ascending, with woody stems up to 6 m long.
Rootstock usually woody, fibrous or rhizomatous.