Stems erect, 50-100 cm, base sometimes trailing, much branched, spreading glandular hairy. Petiole to 1 cm; leaf blade ovate, 2-5 × 1.5-3.2 cm, strigose, base broadly cuneate to rounded, margin remotely crenate-dentate, apex obtuse to acute; upper leaves bractlike. Verticillasters many flowered, globose, to 2 cm in diam. in flower, in capitate, ample panicles; bracts needlelike, 3-5 mm. Pedicel 2-5 mm. Calyx ca. 6 × 1 mm, villous, veins glandular puberulent, throat sparsely hispid; fruiting calyx swollen on 1 side at base, to 2 mm wide; upper teeth triangular, caudate; lower teeth awned. Corolla purple-red, ca. 8 mm, tube puberulent; upper lip straight, emarginate. Stamens included, posterior 2 with small anthers; anterior 2 exserted, with normal anthers. Nutlets brown, ovoid, ca. 1 mm, smooth. Fl. Jul-Aug, fr. Sep.
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