Herbs, weak to ascending, to 70 cm tall; stems generally terete, hispidulous to glabrescent. Leaves in subequal pairs; petiole 1-2 cm, subglabrous or puberulent; blade drying papery, brown, narrowly elliptic, ovate, or lanceolate, [3-]8-15 × [1-]3.5-6 cm, subglabrous or sparsely strigillose adaxially, pilose along principal veins abaxially, base cuneate then narrowed and shortly decurrent, apex shortly acuminate; secondary veins 9-11(-15) pairs; stipules caducous or persistent on upper nodes, linear or bifid, 2-11 mm, puberulent. Inflorescence terminal and/or paired in upper stem nodes, cymose to paniculate, many flowered, ferruginous puberulent; peduncle 2-4 cm; axes helicoid; bracts minute, caducous. Flowers with biology unknown, subsessile. Calyx pubescent; hypanthium ellipsoid, ca. 1 mm; lobes triangular, ca. 0.3 mm. Corolla white, tubular-funnelform, outside glabrous; tube ca. 4[-8] mm, inside glabrous or densely barbate in throat; lobes oblong-triangular, ca. 2 mm, dorsally ridged, apex rostrate. Capsules drying yellow, mitriform-obcordate, ca. 2 × 6-7 mm, subglabrous. Fl. winter and spring.
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