Tree 6–20 m. tall; twigs, buds and leaf-rhachides glabrous or with a few scattered long dark hairs.. Stipules oblong, often semi-persistent; leaf-rhachis up to 12 cm. long; stipellae sometimes present; leaflets 3–8, elliptic, lanceolate or oblong, gradually acuminate, up to 15 cm. long and 7 cm. wide, glabrous.. Raceme many-flowered, densely brown pubescent, some of the hairs up to 1.2 mm. long, the axis up to 3 mm. in diameter; bracts oblong, up to 5 mm. long, caducous; pedicels up to 12 (rarely –19) mm. long; bracteoles elliptic-oblong, 3–4 mm. long, ± 2 mm. wide.. Calyx brown pubescent; tube 4–5 mm. long; lobes very broad, overlapping in the bud, ± 2 mm. long.. Corolla bluish, pinkish or white, 18–22 mm. long.. Filament-sheath 10–13 mm., free parts 5–6 mm., anthers 0.9 mm. long.. Ovary 10–11 mm. long, densely tomentose all over, 3-ovulate; style 5–6 mm. long.. Pod glabrescent but showing traces of indumentum at the base, 2–3-seeded.. Seeds ± 17 by 15 mm.. Fig. 26/1–9, p. 148.
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A medium sized tree. It grows 24 m tall. The bark is pale grey. The leaves are alternate. The leaves are compound with leaflets along the stalk and one at the end. There are 3-9 leaflets. The leaf stalk is about 2 cm long. The leaves are about 12 cm long. The leaflets are 4-15 cm long by 2-7 cm wide. They have a wedge shaped base and taper to the tip. The flowers contain both sexes. They can be blue, pink or white. The fruit are on short stalks. They are flat pods 5-10 cm long and 2-4 cm wide. The pod is unequal and open with the sides twisting. There are 2-3 seeds. The seeds are 17 mm long and 15 mm wide.
It is a tropical plant. It grows in dry and moist forest and along rivers. It grows between 1,100-2,200 m altitude. It is in areas with a rainfall of 850-1,400 mm per year.
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Dry and moist forests, and along rivers, at elevations from 1,100-2,200 metres.