Herbs, sometimes annual, weak to erect, to 60 cm tall; stems pilosulous to tomentulose. Leaves in subequal pairs; petiole 0.5-1.5(-3) cm, puberulent to tomentulose; blade drying thinly papery, ovate-lanceolate, lanceolate, or elliptic, 2-6(-11) × 1-3(-5) cm, adaxially glabrous to sparsely strigillose or hispidulous, abaxially pilosulous or hispidulous along principal veins, base cuneate to obtuse, apex caudate-acuminate, obtuse, acute, or weakly acuminate; secondary veins 5-7(-11) pairs; stipules generally persistent on uppermost nodes, triangular then contracted to linear, 4-10 mm, puberulent to glabrescent. Inflorescence cymose to congested-cymose, several to many flowered, pilosulous to glabrescent; peduncles 1.5-3 cm; axes short to developed, becoming helicoid; bracts few, deciduous, linear, 2-3 mm. Flowers with biology unknown, subsessile. Calyx puberulent; hypanthium ellipsoid, ca. 0.8 mm; lobes 0.2-1.5 mm. Corolla pink to white, tubular-funnelform, outside puberulent to glabrous; tube 3-6 mm, inside with pubescent ring near or above middle; lobes triangular, 1-2 mm, dorsally smooth to ridged. Capsules obconic, 2-2.5 × 4-5 mm, puberulent to glabrescent.
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