Large or medium woody climbers. Leaves opposite; Inflorescence terminal, sometimes also axillary, cymose, often forming a panicle; Sepals narrowly ovate to linear, quite large and showy; Stamens inserted in lower half of corolla tube, completely included in the tube; Fruit of paired follicles; Seeds flattened, narrowly ellipsoid, glabrous;
from India and southern China to western Malesia present
7 species from India and southern China to western Malesia (1 species).
The genus Amphineurion is here treated as distinct from Aganosma. Amphineurion includes the common Amphineurion marginatum, formerly Aganosma marginata.
K. Schum. - in Engl. & Prantl, Nat. Pflanzenfam. 4. 1895: 173
A.DC. - in Prodr. 1844: 432
D.J. Middleton - in Tree Fl. Sabah & Sarawak. 2004: 10
G. Don - in Fl. Thailand. 1999: 104
Backer & Bakh.f. - in Fl. Java. 1965: 237
Pit. - in Lecomte, Fl. Indo-Chine 3. 1933: 1222
G. Don - in PROSEA. 2003: 43
D.J. Middleton - in Kew Bull. 1996: 456
Pichon - in Mém. Mus. Natl. Hist. Nat. 1950: 31