Small trees or shrubs. Leaves opposite or subopposite; Inflorescence a terminal or seemingly axillary cyme; Sepals often unequal in length, linear to narrowly ovate, pubescent outside, pubescent or glabrous inside; Stamens inserted near base of corolla tube, completely included in tube; Fruit of paired follicles; Seeds linear, unbeaked, grooved, with an apical coma.
Africa present, Asia present, Asia-Tropical
4 species from Africa and Asia; in Malesia 2 species.
de Kruif - in Meded. Landbouwhoogeschool Wageningen. 1981: 4
G. Don - in Gen. Syst. 1837: 78
R.Br. - in PROSEA. 1999: 296
A.DC. - in Prodr. 1844: 413
Pit. - in Lecomte, Fl. Indo-Chine 3. 1933: 1168
Pichon - in Mém. Mus. Natl. Hist. Nat. 1950: 157
M.E. Endress et al. - in Pl. Syst. Evol. 1990: 157
D.J. Middleton - in Fl. Thailand. 1999: 73
Benth. & Hook.f. - in Gen. Pl. 1876: 708
K. Schum. - in Engl. & Prantl, Nat. Pflanzenfam. 4. 1895: 137