Large trees to 45 m tall; young branches glabrous. Leaves trifoliolate; petioles 4-20 cm long, terete to flattened, glabrous; leaflets petiolulate, the terminal petiolule 7-25 mm long, the lateral petiolules about equal to the! center one, the petiolules glabrous, terete or shallowly canaliculate; blades elliptic, apically acu-minate, the acumen 5-15 mm long, the margins entire to weakly crenate, basally rounded to subcuneate, glabrous on both surfaces, the terminal blade 12-34 cm long, 6-18 cm broad, the lateral blades equal or slightly smaller than the terminal one, the primary veins 8-18 pairs, plane above, prominent beneath, the venation prominulous beneath; stipels absent. Inflorescences clustered racemes; peduncles 6-10 cm long, glabrous, sparsely lenticellate towards the base; rachis 1-4.5 cm long, glabrous; flowering pedicels 4-6 cm long, 5-8 cm thick, glabrous, ebracte-olate. Flowers with the calyx campanulate, ca. 2 cm long, glabrous on the ex-terior, the lobes 5, rounded; corolla ca. 6-7 cm long, elliptic, glabrous, deep red on the exterior, paler within; stamens extremely numerous, over 700, the filaments caducous as a unit, basally united to 2 mm and then dividing into fused groups before becoming free above, the outer ones 7-8.5 cm long including the base, yel-low, the distal portion tuberculate, many shorter inner filaments present from 3.5 cm long and of all intermediate sizes, the inner filaments only apically tuber-culate, the anthers small; ovary globose, 4-locular, glabrous on the exterior, the styles 4, filamentous, 8-9 cm long, glabrous. Fruits subglobose to sublobate, to 15 cm long, the exocarp glabrous, lenticellate, the pericarp very thick and fleshy, detaching from the mesocarp and endocarp, the mesocarp and endocarp envelop-ing the seed to form a large stone ca. 7 cm broad, 5 cm long, the mesocarp be-coming lignified and hard, the exterior undulate with short rounded tubercles, the endocarp with a tuberculate exterior and a hard thin woody interior ca. 1 mm thick; only 1-2 subreniform seeds developing.
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A tall tree. It grows 45 m tall. It has thick buttresses. The leaves have 3 leaflets. The end leaflet is 12-30 cm long by 6-18 cm wide. There are slightly rounded teeth along the edge. The flowers are in groups of 2-8. Flowers open at night. The flowers are very large and deep red. They have large numbers of yellow stamens. The fruit are 10-15 cm across. The nut is kidney shaped. It is about the size of a hen's egg. The nut is large, soft and sweet.
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