Herbs to subshrubs, weak to erect, to 60[-75] cm tall, usually drying partly to wholly red; stems glabrous or with pilosulous lines. Leaves in subequal pairs; petiole 0.5-2 cm, glabrous or subglabrous; blade drying thinly papery, lanceolate-elliptic, ovate-elliptic, or elliptic-oblong, 5-11(-20) × 2.5-4(-8) cm, glabrous on both surfaces or sparsely pubescent adaxially, base cuneate to obtuse, margins entire or undulate, apex acuminate to caudate; secondary veins 7-10 pairs; stipules caducous, not seen. Inflorescence congested-cymose, many flowered, often pendulous later becoming erect, glabrescent or axes sometimes puberulent to pilosulous in lines; peduncle 1-1.5[-3] cm; axes short; bracts linear-lanceolate, 6-9 mm. Flowers perhaps homostylous, on pedicels 1-1.5 mm. Calyx glabrous to puberulent or densely pilosulous; hypanthium submitriform, ca. 1.5 mm, 5(or 10)-ribbed; lobes ovate-triangular to lanceolate-triangular, usually slightly unequal, 1.4-1.8 mm, with 1 gland in each sinus. Corolla pink or white, tubular-funnelform and swollen at base, outside glabrous; tube 7-7.5[-10] mm, inside glabrous or villous; lobes ovate, ca. 2.5 mm, dorsally narrowly keeled. Capsules mitriform, [2-3.5 × 6-9 mm], glabrous to puberulent or pilosulous. Fl. Jul-Oct.
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