Erect annual, often with spreading weakly ascending branches from the base, up to 10·5 dm. tall, but often much smaller.. Stem obscurely ribbed, appressed puberulous, with small stiff white hairs often brown at the base.. Leaves simple; blade linear-lanceolate to oblong-elliptic or elliptic, up to 38–115 mm. long, 4–12 mm. wide, acute to rounded at the apex, glabrous above, appressed puberulous beneath; petiole 1–2 mm. long.. Stipules linear-subulate, up to 2–5 mm. long.. Racemes lax, up to 9–24 cm. long, ± (6–)10–24-flowered; bracts linear, ± 2–3·5 mm. long; bracteoles adnate to the calyx, linear, up to 2·5 mm. long.. Calyx (4·5–)6–8 mm. long, with the tube protracted on the lower side, rather closely appressed puberulous with hairs like those of the stem; upper lobes narrowly attenuate-triangular, considerably longer than the tube.. Standard elliptic, bright yellow, reddish-purple veined, puberulous apically outside; wings shorter than the keel; keel bent at right-angles in the lower half, with a long straight twisted beak, (7–)8–11 mm. long.. Pod oblong-clavate, narrowed basally into a 2–3 mm. long stipe, up to 27–35 mm. long, 6 mm. across, appressed puberulous, ± 26–34-seeded.. Seeds oblique-cordiform, 1·5–2 mm. long, smooth.
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An erect annual herb. It grows 1 m tall. There are hairs on the stems. The leaves are simple and alternate. The leaf blade is narrow and 2-11 cm long by 2-12 mm wide. There are 10-24 flowers in a group at the top of the plant. These are yellow with red veins. The fruit is an oblong club shaped pod. It is 2.5 cm long by 3.5 cm wide and narrows to the base. There are 15-34 seeds. These are small and heart shaped. They are 2-4 mm across.
Grassland and woodland; also persisting on roadsides and in cultivated land, at elevations from 1,100-2,300 metres.
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It is a tropical plant. It grows between 1,100-2,300 m altitude in grassland and woodland.
Can be grown by seedlings. Seeds needs soaking.
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