Erect or twining shrubs with much branched stems. Sap watery. Leaves op¬posite, ovate or ovate-oblong, small or absent. Flowers in short-peduncled or rarely almost sessile, umbelloid cymes solitary at the nodes. Calyx deeply 5-fid, lobes ovate, subacute. Corolla greenish yellow, rotate or campanulate, pubescent or woolly. Corona double (but the inner series difficult to observe), outer of 5 short fleshy segments attached to the base of the corolla alternating with the lobes, inner reduced to an undulate ring at the base of stipitate gynostegium. Filaments united, anthers incumbent on stigma, not produced into a membranous tip. Pollinium one in each loculus, erect, waxy with pellucid curved appendages at the tip. Follicle ovate-oblong to oblong, tapering towards apex, smooth. Seeds comose.