Trees to 35 m tall; the young branches glabrous, prominently lenticellate. Stipules lanceolate, to 8 mm long, tomentose on exterior, early caducous. Leaves chartaceous, oblong, elliptic to subovate-elliptic, 9.5-20.5 by 4.5-8.5 cm, glabrous on both surfaces, without stomatal cavities beneath, usually 2 glands beneath at base near junction with midrib, acute to shortly acuminate at apex, the tip 7-10 mm long, rounded at base; midrib lightly impressed above except near base, prominent beneath; primary veins 11-16 pairs, plane above, prominent beneath, erect-patent; petioles 5-9 mm long, eglandular, glabrous, rugulose. Inflorescence a lax, much branched, terminal panicle 9-15 cm long, the rachis and branches densely grey sericeous-tomentose; bracts and bracteoles ovate, acute, densely tomentellous on exterior, glabrous within except near apex, caducous. Receptacle campanulate, markedly gibbous, densely grey tomentellous on exterior, 2-3 mm long; pedicels 1-3 mm long. Calyx lobes 2-3 mm long, narrowly ovate, densely grey tomentose on exterior, tomentellous within. Petals spathulate, 2 mm long, caducous. Fertile stamens 7-8, base forming a conspicuous fused ring with opposite tooth-like staminodes. Ovary densely pilose. Style pilose, stigma truncate. Fruit ovoid, 7-8 by 4.5-5.5 cm, exocarp densely lenticellate; mesocarp thin, fleshy; endocarp extremely hard and thick (1-8 cm thick), woody, granular, and very irregularly ridged, with 2 small loculi in centre, densely lanate within.
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