Campylostemon

Lianes or scandent glabrous shrubs, with latex. Leaves opposite, elliptic to oblong or ovate-lanceolate, shallowly to rather deeply crenulate-serrulate, petiolate; stipules free, caducous. Inflorescence pedunculate, cymose, dichasial, simple, without axillary branches, axillary and sometimes terminal; bracts persistent. Flowers bisexual. Sepals 5, imbricate, free or +/-united. Petals (4)5, imbricate in bud, entire, white to yellow. Disc absent. Stamens 3-5; filaments united at base, erect or incurved; anthers versatile, apical or introrse (?rarely extrorse), with thecae +/-confluent, dehiscing transversely; pollen in tetrads. Ovary superior, 3-locular, with 5-16 axile ovules per locule, sessile; style absent; stigmas 3, free, divergent. Fruit of 3 capsular mericarps united at base; mericarps dorsiventrally flattened, dehiscing by median suture. Seeds with long, winged stalks as in Hippocratea . Germination epigeal (1 species). Chromosome number : 2n = 56 (1 species).