Epiphytic subshrub, woody climber or liana, to 3 m. Stem woody at base, scandent, glabrescent below, hirsutulous at apex. Leaves equal or subequal in a pair; petiole 0.3-3.5 cm long, densely strigose to subtomentose, densely pilosulous; blade papyraceous when dry, oblong-elliptic to oblong-ovate, 3-10 x 1.5-4.5 cm, margin crenate-serrulate, apex acute to acuminate, base somewhat rounded, above strigose or substrigose, below strigillose, hirsutulous on midvein and veins. Flowers solitary in reduced cymes; pedicel red, 2.5-8 cm long, hirsutulous. Calyx angulate, pale pink to dark red, lobes connate at base, tube ca. 0.3 cm long, free portion of lobes erect, 4 subequal and dorsal lobe smaller and narrower, broadly ovate, 1.2-2 x 2 cm, margin sharply dentate-serrate, apex acute to acuminate, on both sides strigillose; corolla oblique in calyx, yellow, 2.5-3.5 cm long, tube cylindric, 2-3 cm long, base gibbous posteriorly, 0.3-0.5 cm wide, middle subventricose, throat slightly constricted, 0.5-0.8 cm wide, outside densely pilose, pilosulous, inside glabrous, limb 0.9-1.4 cm wide, lobes subequal, spreading, rounded, 0.2-0.4 x 0.25-0.4 cm wide, margin minutely dentate; stamens adnate ca. 0.4 cm to base of corolla tube; ovary ovoid, 0.4-0.5 x 0.3 cm, strigillose, style ca. 2.5 cm long, glabrous, stigma stomatomorphic. Mature capsule white, globose, ca. 1 x 1 cm.