A large shrub or small tree reaching 6-7 m, stem and branches glabrous, more or less corky, lactiferous. Leaves spiral or alternate, crowded linear-lanceolate, acute or shortly acuminate, attenuate at base, 8-15 x 1 cm, bright green and shining above, sub-coriaceous, margin slightly recurved, midrib prominent, lateral nerves obscure, subsessile, with glands in the axils. Inflorescence of few flowered cymes, generally terminal, peduncle very short, bracts variable, caducous. Flowers yellow or orange, pedicel c. 7.5 (-3) cm long, bracteoles deltoid-elongated, c. 2 mm long, with glands at the axil. Calyx 6-7.5 mm long, glabrous, persistent, divided nearly upto the base; lobes long acuminate, spreading. Corolla c. 5 cm long, tubular at the base, campanulate at the throat, hairy; corona present, pubescent, opposite and above the stamen, tube 12-15 mm long, lobes 3-3.5 x 1.7 cm, obovate; Disc thick, cup shaped; ovules 2 in each carpel, stigma broad angular, Fruit somewhat rhomboid, 3 cm long. Seeds 2(-4), c. 1 cm long.