Tree 4.5–30 m. high; crown spreading; bark rough or smooth.. Young branchlets densely to very sparsely clothed with minute crisped puberulence, usually soon disappearing but sometimes persistent.. Leaves: pinnae (Fig. 22/6, p. 163) (1–)2–3(–4, even—fide I.T.U. –5) pairs, each pinna broadening towards apex; leaflets of 2 distal pairs of pinnae 2–5 (very rarely 6) pairs, obliquely rhombic to obovate, with the distal pair largest, 29–72 mm. long, 16–43 mm. wide; lower pairs smaller, down to about 12 × 8 mm.; apex obtuse, rarely subacute; base not auricled; surface beneath glabrous except for puberulence on midrib and margins.. Stipules and bracts at base of peduncles very caducous, narrowly triangular-lanceolate and acute, 2–7 mm. long, 1–2 mm. wide.. Peduncles clothed as branchlets; bracteoles very caducous, subulate-linear to oblanceolate, 1.75–3 mm. long.. Flowers subsessile; pedicels puberulous, 0.25–0.5(–0.75) mm. long.. Calyx 2–4 mm. long, puberulous outside.. Corolla 6–9(–10) mm. long, densely and minutely pubescent or puberulous outside, white or pink.. Staminal tube red, exserted about 1–1.8 cm. beyond corolla.. Pod oblong, flat or somewhat transversely plicate, mostly 10–18 cm. long and 2–4 cm. wide, usually pubescent or puberulous on stipe, otherwise glabrous or nearly so.. Seeds about 7.5–10 mm. long and 6.5–8.5 mm. wide, flattened.
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A tree which loses its leaves. It is usually 20 m tall but can vary from 9-30 m tall. It has a spreading crown which occurs in layers. The trunk is often crooked. The bark is smooth but when mature becomes brown and cracked. The outer layer of the bark looks like orange peel when cut. The leaves are twice divided. 3 pairs then 2-5 pairs. They do not have a dense covering of hairs. The end leaflet is the longest (3-7 cm) and the one nearest the stalk is shortest (1 cm). There are normally 2-5 pairs of leaflets. The flower are half round heads about 2 cm across. The male and female flowers are of different colours. The fruit is a flat pod. They are papery and 10 cm long by 2 cm wide. They contain 9-12 flat seeds about 1 cm across.
Flowers white with red staminal tube