Tree, up to ca 11 m high, 60 cm diam. Leaves elliptic to obovate, ca 14-20-nerved, ca 15-40 by 10-30 cm, with rounded apex and base and slightly to manifestly dentate margin. Petiole 3-4 cm long, strigose beneath, with obovate wings. Wings ca 3-5 by 2¼-4 cm, with rounded apex and entire margin, more or less woolly hairy beneath, wholly caducous. Flowers terminal, solitary or less often 2-3 together, if solitary with 2-5 or without bracteoles, if 2 (resp. 3) 1 (resp. 2) with and 1 without bracteoles; ca 17½ cm diam. Sepals 11-17, the outer ones ca 20 by 22 mm, the inner ones ca 65 by 40 mm. Petals white or, rarely, rose red (var. rosea ELM.), ca 9 by 5 cm. Stamens in 2 groups, outer group ca 375, 11 mm long, straight in bud, inner group ca 60, 25 mm long, with their apex reflexed in bud. Carpels ca 15, ca 12 by 3 mm, with ca 18 mm long, recurved styles, each with 9-12 ovules. Fruit indehiscent, subglobose, 5-8 cm diam. including the enclosing sepals. Carpels 20-25 by 10-12 mm, 1-4-seeded. Seeds black, enclosed by a membranaceous aril.
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