Shrubs or small trees, buttresses absent. Branchlets terete to winged; Leaves opposite; Inflorescence terminal; Sepals erect; Stamens inserted around the middle of the tube to near the tube throat, very rarely near base, not exserted from throat; Ovules 2 in each carpel although only ever one develops. Fruit of paired drupes, more rarely solitary, ellipsoid to falcate, flattened to various degrees (hardly at all in K. arborea), usually with spur-like appendages facing inwards towards each other, rarely absent. Seeds curved, broader at one end, other end acuminate.
Asia-Tropical, from Southern China and Burma to northern Australia and Vanuatu present
23 species from Southern China and Burma to northern Australia and Vanuatu; in Malesia 19 species.
Backer & Bakh.f. - in Fl. Java. 1965: 232
Pit. - in Lecomte, Fl. Indo-Chine 3. 1933: 1132
A.DC. - in Prodr. 1844: 351
G. Don - in Gen. Hist. 1837: 100
D.J. Middleton - in Fl. Thailand. 1999: 60
Benth. & Hook.f. - in Gen. Pl. 1876: 701
Blume - in Harvard Pap. Bot. 2004: 92
Blume - in Tree Fl. Sabah & Sarawak. 2004: 35
Pichon - in Mém. Mus. Natl. Hist. Nat. 1949: 171