Apodostigma

Tall, glabrous, unarmed lianes, latex absent. Leaves opposite to slightly subopposite, simple, entire to faintly dentate, petiolate; stipules free, minute, inserted at nodes. Inflorescences of axillary, dichotomous cymes with a single terminal flower and two equal branches at each fork. Flowers small, somewhat irregular, pedicellate; young buds globose. Sepals 5, imbricate. Petals 5, not spreading but rather arcuate, 4 of them +/-equally arched. Disc divided into 3 crescent-shaped substaminal lobes, each of which enfolds a stamen. Stamens 3; filaments very short, broad; anthers extrorse, transversely dehiscent; pollen small, simple, tricolporate. Ovary with 3 locules, each with 2 ovules; stigmas 3, sessile, together forming a +/-triangular organ which exceeds the stamens, each stigma curved down over an anther. Fruit of 3 flattened mericarps, each dehiscing by median sutures into 2 caducous valves. Seeds 2 in each mericarp, winged, wings with a marginal vein and a submedian vein (raphe); cotyledons not united; radicle acute and prominent; germination epigeal.