Herbs perennial, climbing. Rhizomes absent. Stems long, branched, climbing, basally woody. Leaves alternate. Inflorescences borne near apex of branches, penetrating leaf sheaths, each a sessile head usually with several flowers. Flowers actinomorphic. Sepals free, imbricate, carinate. Petals free, pink, green, or white, elliptic or oblong. Stamens 6, all fertile, subequal; filaments lanate; anther locules oblong or deltoid-ovoid, connate for most of their length, dehiscent by apical pores. Ovary 3-loculed; ovules 2 per locule. Capsule 3-valved, ellipsoid or ovoid-globose, trigonous. Seeds 2 per valve, cylindric, trigonous, rugose, reticulate; hilum linear.
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