Erect annual or short-lived perennial herb, usually with rather purplish stems, up to 2 m. tall, everywhere covered with short appressed biramous hairs which are almost all brown or blackish on the pod, corolla and calyx, mixed brown and white on the inflorescence and mainly white elsewhere; multicellular hairs usually present on the pods, sometimes elsewhere.. Stipules subulate, 1–4 mm. long; leaf-rhachis up to 4 cm. long including a petiole of 2–15 mm., prolonged 2–8 mm. beyond the lateral leaflets; leaflets 5–11, narrowly elliptic-oblong, up to 25mm. long and 10 mm. broad.. Racemes many-flowered, ± secund, usually dense, up to 10 cm. long including a peduncle of up to 3 cm.; pedicels up to 1.5 mm. long.. Calyx dark brown, with triangular-subulate teeth up to half as long as the 2.5–3.5 mm. long filaments.. Pod spreading or somewhat ascending, cylindrical, 3–7 mm. long, 2 mm. wide, the multicellular hairs, when present, pale, 1-or more often 2-seeded; endocarp hardly spotted.. Seeds yellowish, smooth.
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