Aganosma G.Don

Large or medium woody climbers. Leaves opposite; usually with an interpetiolar ridge bearing colleters. Inflorescence terminal, sometimes also axillary, cymose, often forming a panicle; flowers 5-merous. Sepals narrowly ovate to linear, quite large and showy; colleters in sepal sinuses inside. Corolla lobes dextrorse in bud; mature corolla with spreading or erect lobes. Stamens inserted in lower half of corolla tube, completely included in the tube; filaments short; anthers fertile in the upper half only, the lower half sterile, laterally with lignified guide rails and sagittate appendages at the base; adnate to the style head. Disk a continuous ring, flat-topped or 5-lobed. Gynoecium 2-carpellate, apocarpous but apically united into a common style; ovules numerous; ovaries pubescent or glabrous; style consisting of a basal part which widens at the top, then a ring to which the stamens are attached, then a columnar upper part to the top of which the stamens are attached again and then a small sharp point on the very top. Fruit of paired follicles; linear. Seeds flattened, narrowly ellipsoid, glabrous; with an apical coma.