Herbs 5-25 cm tall; root system unknown; stems salmon to white, variously branched from base. Leaves narrowly triangular to triangular, 2-6 mm long. Inflorescence a cyme consisting of several dichasia, to 30-flowered, rarely few- to 1-flowered. Flowers 5-6-merous, sometimes fragrant; calyx campanulate to tubular, 2.5-6 mm long, tube 1.5-3 mm long, lobes narrowly triangular to subulate, 1.5-3 mm long, sinuses obtuse; corolla white to pale pink, trumpet-shaped, 10-20 mm long, tube 8-15 mm long, inner side glabrous to hairy, lobes narrowly triangular to triangular, 2-5 mm long; stamens inserted 2-4 mm below throat, filaments 0.5-3 mm long, glabrous to papillate, anthers 1-1.5 mm long, free or coherent, apex rounded-truncate; ovary fusiform, 3-4 mm long, shortly stipitate, style 3-5(-10) mm long. Capsule ellipsoid, 4-6 mm long, septicidally dehiscent from base to apex or sometimes in middle only; seeds saccate, 0.1-0.2 mm long.
Amazonian Brazil present, C America present, Guianas present present, Southern America: Colombia (Colombia present); Peru (Peru present); Venezuela (Venezuela present)
C America, Colombia, Venezuela, the Guianas, and Amazonian Brazil and Peru; 158 collections studied from the Guianas (GU: 34; SU: 31; FG: 93).