Herbs 60-120 cm tall. Stems erect, branched, slender, sulcate, sparsely pubescent. Petiole 0.5-1.5 cm, sulcate, pubescent; leaf blade ovate to ovate-lanceolate, 4-8 × 2-5 cm, abaxially pale gray and sparsely pubescent, adaxially green, densely covered with cystoliths, and densely brownish pilose on midveins but otherwise sparsely pubescent with few large-celled white trichomes, secondary veins 4-6 on each side of midvein, base broadly cuneate and decurrent onto petiole, margin entire or sinuate, apex acuminate. Inflorescences axillary, each of 2 or 3 cymes; peduncle to 7 cm, white tomentose; inflorescence bracts linear, 7-10 × 1-2 mm, puberulent; cymules 3-6 per cyme; outer bracteoles subcircular to obovate, 1.5-2 × 1-1.5 cm, unequal, abaxially with cystoliths and pilose, palmately 3-or 5-veined, base rounded, apex mucronate; inner bracteoles linear-lanceolate, 5-7 × ca. 1 mm, abaxially puberulent, apex acuminate. Pedicel 0.5-2 mm. Calyx 6-7 mm; lobes linear-lanceolate, outside puberulent, apex acuminate. Corolla pinkish red, ca. 1.8 cm, outside pubescent; tube slender; limb 2-lipped. Staminal filaments ca. 5 mm, glabrous; anther thecae spherical, ca. 1 mm, inserted at slightly different levels. Ovary slightly pilose. Capsule ca. 6 mm, light yellow pilose. Seeds light brown, circular in outline, ca. 1.5 × 1.5 mm, compressed, yellowish papillate. Fl. Aug-Oct, fr. Oct-Dec.
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