Herbs 5-15 cm tall; stems white, simple or branched. Leaves ovate, 1-4 mm long. Flowers 4-5-merous; sepals narrowly triangular, 3-10 mm long, sometimes recurved; corolla white, 3.5-12 mm long, tube sometimes constricted near throat, 3-10 mm long, lobes elliptic to ovate, 0.5-3 mm long; stamens inserted 1-4 mm below throat, filaments 0.1-1 mm long, anthers 0.5-1.5 mm long, connective sometimes prolonged beyond thecae; ovary ovoid, 1-3 mm long, style 1-9 mm long. Capsule 1-5 mm long; seeds ca. 0.2 mm in diam.
Guianas: present present Southern America:, Colombia (Colombia present); Venezuela (Venezuela present)
Colombia, Venezuela, the Guianas, and Brazil; 82 collections studied from the Guianas (GU: 19; SU: 24; FG: 39).