Tree up to 40 m high and c. 70 cm in diam. Leaves 3- or 4-jugate; petiole 2-2.5 cm and rachis c. 7 cm long, minutely puberulous, glabrescent. Stipules foliaceous, subintrapetiolar, falcate, up to c. 8 mm long, acuminate, rounded auriculate at base, reticulate and finely puberulous on both surfaces, early caducous. Inflorescences paniculate, up to 15 cm long, lateral branches up to c. 7 cm long, both rachis and branches densely puberulous; bracts and bracteoles triangular, ovate, or lanceolate, 4-7 mm long, puberulous on both surfaces; pedicels subsessile or very short, up to 3 mm, puberulous. Petal slightly obovate or elliptic, c. 5 by 2.5 mm; puberulous outside and glabrous inside. Stamens: united basal parts of the filaments very short; free filaments up to c. 10 mm, slightly hairy at the lower part; fertile anthers various in size, the larger ones ovoid- ellipsoid, c. 2.5 mm long, the others smaller. Ovary sessile, subrhomboid, c. 5 mm long, densely hairy, with numerous minute, spiny outgrowths, 2-4-ovuled; style up to c. 10 mm, recurvate, glabrous or sparsely hairy in the basal part; stigma small, capitate. Seeds arillate.
Asia-Tropical: Borneo (Sabah present); Malaya (Peninsular Malaysia present), Peninsula present, Riau Archipelago present
Thailand (Peninsula); Malesia: Riau Archipelago, Malay Peninsula, Borneo (Sabah).
Sindora echinocalyx is very closely allied to S. wallichii but can be distinguished from the latter even in sterile material by the leaflets with prominently reticulate venation on the upper surface (against smooth, shining and not reticulate). There is one sterile sapling collection, FRI1202 (L), c. 6 m tall, bearing prominent foliaceous stipules (up to 18 by 8 mm), and rather larger leaflets (up to 15 by 7 cm) with acute or shortly acuminate apex and prominently reticulate venation on both surfaces.