Terrestrial herb, 10-30 cm tall (including leaves). Stem succulent, erect, villous. Leaves equal to strongly unequal in a pair; petiole to 9 cm long, appressed tomentose to hirsute; blade membranous or papyraceous when dry, oblanceolate, larger blade in a pair 2-28 x 0.8-5 cm, margin sharply serrate, apex acute to acuminate, base cuneate to long-decurrent, above hirsute or subtomentose to glabrous, below subtomentose to glabrous. Flowers numerous, paniculate; peduncle 1-10 cm long, sparsely strigillose; pedicel 0.5-3.5 cm long, sparsely strigillose. Calyx subcampanulate, green, lobes shortly connate at base, erect to spreading, subequal, linear-lanceolate, 0.3-0.6 x 0.05-0.1 cm, margin entire, apex long acuminate, outside sparsely strigillose, inside glabrous; corolla erect in calyx, white, 0.8-1 cm long, tube cylindric, 0.65-0.75 cm long, slightly constricted above base, 0.1-0.15 cm, middle funnelform, throat not ventricose, 0.15-0.2 cm wide, outside glabrous, inside glabrous, limb 0.5-0.7 cm wide, lobes subequal, spreading, ovate-oblong, 0.2-0.3 x 0.15-0.2 cm, margin entire, glandular-pubescent; stamens included, adnate for ca. 0.2 cm to base of corolla tube; ovary ovoid, 0.2 x 0.15 cm, puberulent to glabrous, style 0.25-0.3 cm long, glabrous, stigma capitate. Mature capsule green to brown, oblong-ovoid, 0.3-0.5 x 0.2 cm.
Bolivar present, Guyana present, Parrá present, Southern America: Brazil North (Amazonas present ‒ present), eastern Venezuela present, northern Brazil present
Eastern Venezuela (Amazonas, Bolívar), northern Brazil (Amazonas, Parrá) and Guyana; 65 collections studied (GU: 13).