shrubs, upright or scandent, spines supra-axillary, without nodal scars. Leaves
opposite, entire, shortly petiolate, stipules ovate, cuspidate. Flowers
solitary or few in condensed cymes in leaf axils or on spurs, often subsessile
at anthesis, peduncles, bracts and bracteoles very reduced. Flowers 5-merous.
Calyx lobed, the tube short. Corolla hypocrateriform, hairy inside around
throat. Anthers subsessile, inserted on rim of tube, partly or entirely
exserted. Ovary 2-locular, placentae septal, styles longitudinally.