Terrestrial or epiphytic herb, low shrub, or more usually a liana, when erect to 2 m tall, or up to 10 m long. Stem succulent when young, becoming subwoody, erect or scandent, sparsely strigose or puberulous towards apex. Leaves equal to nearly equal in a pair; petiole 0.6-3 cm long, appressed pubescent; blade chartaceous when dry, elliptic or oblong to obovate, 4-19 x 2-6 cm, margin serrulate to sinuate-dentate, apex acute or acuminate, base cuneate to rounded, sometimes oblique, above sparsely strigillose to scabrous, below sparsely strigillose to glabrescent, less between veins. Flowers solitary or rarely 3 in a fascicle; epedunculate; pedicel 0.5-2.5 cm long, puberulous. Calyx green, lobes more or less free, 4 erect, subequal, leaf-like, ovate, lanceolate to oblong, 2-5 x 0.5-3.0 cm, margin all entire, sinuate to serrulate, apex acute or acuminate, dorsal lobe recurved and smaller, outside and inside puberulous or sparsely strigillose; corolla oblique in calyx, variously colored, from white to pale yellow or dark red, 3-7 cm long, tube wide tubular, 2-3 cm long, base spurred, 0.3-0.8 cm wide, middle gibbous dorsally, broadening towards throat, throat round, 1-2 cm wide, outside puberulent, inside glandular-pubescent at least towards throat, limb 3-4 cm wide, lobes spreading, rounded, 1-1.5 x 1-1.5 cm, margin serrulate, except lower lobe erose, larger and oblique; stamens included, inserted on corolla base; ovary ovoid, 0.5-0.8 x 0.4-0.6 cm, puberulous, style ca. 2.5 cm long, glandular-pubescent, stigma 2-lobed. Mature capsule yellowish to purplish outside, orange to red inside, globose to broadly ovoid, 1-2 x 1-2 cm.
Lesser Antilles present, Matto Grosso present, Northern America, Southern America
Widely distributed from Mexico to Matto Grosso in Brazil, and in the Lesser Antilles; > 80 collections studied (GU: 1; SU: 15; FG: 20).