Leaves opposite, those of a pair equal; Inflorescence a terminal and/or axillary cyme; Sepals with a row of colleters inside. Stamens subsessile, inserted below or above middle of tube, adnate at middle of anther to apex of style head and again at base of anther to base of style head; Fruit of paired follicles; Seeds consisting of a linear seed and apical coma directed towards apex of fruit;
Asia-Tropical, from India and Japan to western Malesia present
6-10 species from India and Japan to western Malesia; in Malesia 3 species.
1 There are considerably more names published in this genus than recognisable species but the patterns of variation have not been adequately studied. Most of these names pertain to taxa in Japan and China. The synonyms given for the taxa below are not intended to be exhaustive and I have included only those for which I have had ready access to the type material and could confirm their status. A more thorough synonymy must await a comprehensive revision of the genus. 2 Recent research has confirmed that the North American Trachelospermum difforme is not closely related to the Asian taxa and should be treated in the genus Thrysanthella.
C.K. Schneid. - in Sarg., Pl. Wilson. 3. 1916: 332
Woodson - in Sunyatsenia. 1936: 65
Lem. - in Mém. Mus. Natl. Hist. Nat. 1950: 30
Benth. & Hook.f. - in Gen. Pl. 1876: 720
Pit. - in Lecomte, Fl. Indo-Chine 3. 1933: 1243
Pichon - in Bull. Mus. Hist. Nat. (Paris). 1948: 190
D.J. Middleton - in Fl. Thailand. 1999: 110
Backer & Bakh.f. - in Fl. Java. 1965: 234
K. Schum. - in Engl. & Prantl, Nat. Pflanzenfam. 4. 1895: 173
Zijlstra et al. - in Taxon. 1998: 163