Perennial herbs. Stems erect, (30-)50-100(-150) cm, base glabrescent, angles sparsely pubescent, much branched at apex, branches slender. Petiole to 4 cm; leaf blade rhombic-ovate to lanceolate, mid stem leaves ca. 6 × 4 cm, upper and lower stem leaves smaller, papery, adaxially densely strigillose, abaxially glabrous, sparsely strigillose on veins, abruptly contracted from middle of blades, margin crenate-serrate, apex acuminate, lateral veins 3-or 4-paired. Panicles terminal, narrow, 6-10(-15) × ca. 2.5 cm, glandular pubescent; cymes pedunculate, 3-5-flowered; floral leaves similar to stem leaves. Calyx broadly campanulate, ca. 3 mm, puberulent, purplish, 2-lipped; teeth subequal, ca. 1/2 as long as calyx, upper 3 slightly smaller; fruiting calyx ca. 6 mm, obviously veined, subglabrous, glandular, slightly curved. Corolla white or purplish with purple marks, ca. 7 mm, puberulent, glandular, tube ca. 3.5 mm, upper lip ca. 3 mm, lower lip ca. 3.5 mm. Stamens included. Style included. Nutlets brown, compressed, oblong, ca. 1.3 mm, glabrous, verruculose. Fl. Aug-Sep, fr. Sep-Oct.
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