Epiphytic liana or subshrub, to 5 m tall. Stem woody at base, scandent, yellow-tomentose or reddish brown with white hairs near apex, glabrescent below. Leaves mostly unequal in a pair; petiole 2-5.5 cm long, yellow-tomentose; blade papyraceous when dry, obliquely oblong-elliptic to broadly elliptic, larger blade 7.5-16 x 3-7 cm, margin serrate, apex shortly acuminate, base obliquely cuneate, not decurrent, above pilosulous, below hirsute to pilose. Flowers 1-2 in reduced cymes; pedicel 0.9-1.2 cm long, hirsute to densely tomentose. Calyx angulate, red, lobes free, erect, subequal, ovate, 2-3 x 1-1.25(-2) cm, margin dentate-serrate to entire at apex, apex acute, on both sides hirsute; corolla oblique in calyx, yellow, 2.0-2.8 cm long, tube cylindric, 1.8-2.4 cm long, base slightly gibbous, 0.5 cm wide, middle curved, ampliate, throat contracted, 0.5 cm wide, outside glabrous at base, densely yellow-sericeous towards apex, inside pilosulous towards apex, limb 0.3-0.4 cm wide, lobes equal, erect, triangular, 0.2 x 0.2 cm wide, margin nearly entire; stamens adnate to base of corolla tube; ovary ovoid, ca. 0.3 x 0.25 cm, densely pilose, style ca. 2 cm long, glabrous, stigma 2-lobed. Mature capsule white, subglobose, ca. 1.2 x 1 cm.
Guayana Highlands in Venezuela present, Guyana present, Southern America: Brazil North (Roraima present), Suriname present, eastern Colombia present, eastern Peru present
Eastern Colombia to eastern Peru, Brazil (Roraima), Guayana Highlands in Venezuela, Guyana, and Suriname; > 100 collections studied (GU: 50; SU: 6).