Twining herbs or subshrubs. Stem and branches
pubescent or tomentose. Leaves cordate, sparsely or densely tomentose on both
surfaces. Cymes umbel-like to almost raceme-like, solitary at nodes, pubescent
or hispid throughout. Flowers with filiform pedicels. Calyx lobes lanceolate to
ovate-lanceolate. Corolla yellowish or greenish-white, glabrous, tube short.
Corona in 2 series, the outer consisting of 5 scales, glabrous, denticulate,
annulus at base of staminal column, inner consisting of 5 long scales, attached
to back of anthers, produced into a short and radically divergent spur at base.
Anthers with connective formed into an inflexed membranous tip. Pollinia
sub-compressed, waxy, pendulous, solitary in each anther sac. Follicles nearly
ovoid, echinate, tapering to a long beak.