Tree up to 15–25 m. high, not buttressed, with smooth yellowish-grey bark scaling off in patches; crown dense, round; young bran.chlets densely brown-pubescent; older twigs glabrous.. Leaves: petiole with rhachis 7.5–15(–20) cm. long, brown-pubescent; leaflets in 4–6 pairs, oblong-lanceolate to narrowly oblong-elliptic, 5–12(–17.5) cm. long, 1.2–3(–6.9) cm. wide, acuminate, rounded to cuneate-rounded at base, glabrous above, beneath with a very dense minute appressed indumentum concealing the surface and with a silky copper-coloured sheen; lateral nerves 12–18 on each side of the midrib.. Hypanthium glabrous.. Petals 5, one of them much larger than the rest and deeply bilobed; 4 very reduced.. Stamens (4–)5 large, well-developed; 4 minute, staminodial.. Pods elliptic to irregularly oblong, 5–9.5 cm. long, 4–5 cm. wide, densely dark brown-tomentellous; obliquely transverse nerves numerous and raised.. Fig. 33.
Rain-forest; riversides; at elevations from 1,200-2,130 metres. Montane forest on fertile (volcanic) soils; at elevations from 900-2,300 metres.
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