Herbs erect, 20-50 cm tall. Stems stout, much branched, hirtellous, woody at base. Petiole 5-10 mm, hirtellous; leaf blade elliptic, 4-8 × 1-2.4 cm, usually hirtellous, base cuneate, margin entire, apex acute to acuminate; lateral veins 7-9 pairs, inconspicuous. Cymes terminal, paniculate or corymbose, scorpioid, 5-9 × 6-9 cm. Flowers in 2 ranks along 1 side of rachis. Calyx green; lobes lanceolate to narrowly lanceolate, 2.5-3 mm, densely hirtellous outside. Corolla purple, 6-7 mm, sparsely pubescent outside; tube cylindric, 4-5 mm, elongated at anthesis; lobes of limb rounded. Filaments short, slender, inserted above base. Style terete, slightly longer than ovary; stigma conical, ca. 1 mm. Mericarps pale gray-green, subreniform, ca. 1 mm, glabrous, with obscure dots, without ribs.
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