Corolla joined up to halfway, 5-lobed, radially symmetrical to slightly zygomorphic, yellow to red without any marked colour-banding, puberulous to hirsute, weakly explosive at anthesis; buds opening first by vents below middle, only slightly expanded over the anthers; tube with a slight to marked basal swelling, sometimes with a short V-slit at anthesis; lobes usually erect, often partly cohering at tips, some or all sometimes spreading to slightly reflexed from near point of filament insertion, occasionally coiled and tending to break off.
Stamen filaments attached 6–10 mm above base of corolla lobes, slender, upper part slightly thickened, ± articulate, the upper part coiling, collapsing and breaking off to various degrees; anthers basifixed, 4-thecous; connective-appendage minute to subulate.
Shrubs extending to 2 m or more from a single haustorial attachment; hairs stellate and dendritic; twigs slightly compressed to angular, soon terete.
Flowers in racemes or spikes from axils and older nodes, few–many-flowered; bract small, unilateral.
Leaves mostly opposite or subopposite, rarely clustered, shortly petiolate, penninerved.
Berry, where known, blue-green, ovoid-ellipsoid to obovoid; seed orange to red.
Calyx saucer-shaped to tubular, entire to shortly toothed.
Style filiform; stigma ovoid to fusiform.