Dinophora

Glabrous shrubs, sparsely branched; branches slender, 4-angular. Leaves opposite, unequal at same node, petiolate, lanceolate-cordate, acutely acuminate, 5- or 7-nerved at base, serrate with mucronate teeth. Flowers in lax terminal dichotomous panicles; pedicels slender. Calyx: tube/receptacle smooth, short, entire or faintly dentate. Petals 5, ovate-lanceolate, pink. Stamens 10, in 2 subequal whorls; outer stamens with connective produced below and anterior appendage 2-lobed; inner ones with curved anther and connective not produced but with 2 anterior tubercles. Ovary adhering to calyx tube/receptacle by 5 ribs, glabrous, apex convex; style thick, sigmoid; stigma punctiform. Fruit broadly ellipsoid, with very thin walls, splitting irregularly. Seeds: hilum large; embryo curved.