Oncella Tiegh.

Small well-branched shrubs from a single haustorial attachment; hairs stellate and dendritic; twigs slightly compressed to angular, soon terete. Leaves opposite or subopposite, shortly petiolate, penninerved. Flowers in racemes; bract small, unilateral. Calyx short, entire to shortly toothed. Corolla joined halfway, 5-lobed, radially symmetrical, orange to pink or red, with a dark glandular patch at the base of each lobe, stellate-pubescent, weakly explosive at anthesis; tube with a basal swelling; bud-tip fusiform to obovoid; lobes usually erect, often partly cohering at tips, some or all sometimes spreading to slightly reflexed from near the point of filament-insertion, occasionally coiled and tending to break off. Filaments attached a little less than halfway up the corolla-lobes, slender in lower persistent part, jointed and slightly thickened above, the upper part coiling, collapsing and breaking off to various degrees; anthers basifixed, 4-thecous; if the thecae short (less than 2 mm.) then unequal, the dorsal ones shorter; connective-appendage minute to subulate or expanded and ± bilobed. Style filiform; stigma ovoid to obovoid or fusiform. Berry white to red (sometimes turning black), ellipsoid, with persistent calyx.