Terrestrial or epiphytic herb, about 30-40 cm tall. Stem sappy becoming subwoody at base, procumbent, hirsute, glabrescent towards base. Leaves strongly unequal in a pair; petiole 0.6-1.4 cm long, hirsute; blade chartaceous when dry, oblong-lanceolate, larger blade 17-40 x 4.5-11 cm, margin repand-serrate, ciliate, apex acuminate, base long-decurrent into petiole, above hirsute, below hirsute, especially on midrib and veins. Flowers many, in fascicles; peduncle very short or obsolete; pedicel 1-2.5 cm long, hirsute. Calyx purplish or crimson, lobes free, 4erect, dorsal lobe curved around spur, subequal, linear, 1-2 x 0.1-0.2 cm, margin with some teeth, apex long-acuminate, outside hirsute, inside glabrous; corolla slightly oblique in calyx, white or creamy, 3-4 cm long, tube infundibuliform, about 2-3.3 cm long, base shortly spurred, 0.15 cm wide, middle gradually widened, not or hardly ventricose, throat somewhat contracted, 0.5-0.8 cm wide, outside pubescent, inside glabrous, limb 0.8-1.5 cm wide, lobes unequal, spreading, broadly rounded, 0.3-0.7 x 0.3-0.4 cm wide, margin fimbriate; stamens included, inserted on base of corolla; ovary ovoid, 0.3-0.4 x 0.2-0.25 cm, softly hirsute, style 1.5-3 cm long, sparsely pubescent, stigma capitate. Mature capsule included in persistent calyx, 1 cm long, 0.8 cm wide.
Guianas present, Southern America: Brazil North (Amazonas present); Colombia (Colombia present); Ecuador (Ecuador present); Peru (Peru present); Venezuela (Venezuela present)
Colombia, Ecuador, Peru, Venezuela, the Guianas, and Brazil (Amazonas); > 100 collections studied (GU: 6; SU: 2; FG: 6).