Calyx-tube cup-shaped, bracteolate at the base; bracteoles calyculate; limb shortly cleft; lobes 4–5, rounded, imbricated in bud. Corolla funnel-shaped, deeply 6–7-fid; tube exserted, cylindrical below, funnel-shaped above; throat pubescent; lobes spreading, oval, contorted dextrorsely (as seen from within). Stamens 6–7, exserted, inserted at the mouth of the corolla; filaments short, glabrous; anthers narrowly linear, apiculate, fixed at the back a little above the base, versatile, glabrous or slightly puberulous at the back. Disk annular, fleshy, glabrous. Ovary 2–1-celled; style glabrous below; stigma thicker, exserted, elongate-clavate, pubescent, bifid or bidentate, lobes pointed; ovules solitary, pendulous from a thickened funicle. Fruit …—Shrubby. Leaves opposite, subsessile, cordate, lucid, thinly coriaceous, with interpetiolar ovate apiculate stipules. Flowers hermaphrodite, white, fragrant, rather large, in dense subterminal corymbs.