Dendrobium heterocarpum Wall. ex Lindl.

Stem 20-35 cm, clavate. Leaves 8-10 x 2 cm, oblong-lanceolate, acute at both ends, 2 or 3 towards the tip. Flowers white, in short, 2-4 flowered raceme on leafless stem; dorsal sepal 23 x 9 mm, oblong-lanceolate, obtuse, 5-veined; lateral sepals 21 x 6-11 mm, obliquely ovate-oblong, lanceolate, subacute, 7-veined; petals 23 x 10-12 mm, obliquely elliptic, apiculate, 7-veined; lip 21 x 10-15 mm, quadrately ovate, apiculate, hairy within; side lobes ovate, obtuse; midlobe ovate, acute, apiculate, margins, crenulate.

Epiphyte. Stems three or four together, 10 to 15cm long and 2 to 3 cm in cross section at the apex, narrowed at the base and gradually widening towards the apex, ribbed, sheathed. Leaves 4 to 6 cm long and 1 to 2 cm in width, elliptic-oblong, sub-acute, deciduous during flowering. Flowers 3 to 5 on a short peduncle, 2 to 3 cm across. Sepals and petals pale brownish green, lip is of a slightly darker shade of sepals and petals, with many brownish red streaks and spots on its disc and sides. Sepals sub-equal, the dorsal longer, linear-oblong; the lateral pair lanceolate. Petals smaller and broader than the sepals, lanceolate. Both sepals and petals five nerved. Lip pointed, decurved, with undulate edges and hairy disc.