Herbs perennial. Stems erect, glabrous, sparsely glandular, angles puberulent. Petiole 1-6 cm, narrowly winged; leaf blade broadly ovate to subcircular, 4.5-11.5 × ca. 8 cm, herbaceous or ± membranous, adaxially sparsely strigose-hispidulous, densely puberulent on veins, abaxially sparsely puberulent, base abruptly attenuate-decurrent, margin coarsely or double serrate, apex acuminate, lateral veins 4-or 5-paired. Panicles narrow, terminal, to 15 cm, densely glandular pubescent; cymes pedunculate, widely spaced, 1-5-flowered; lower floral leaves short petiolate, ovate, 1.5-2 cm, margin coarsely dentate. Calyx broadly campanulate, ca. 2 × to 3 mm, pubescent, glandular, conspicuously 2-lipped to below middle, teeth acuminate; fruiting calyx dilated to 8 × 8 mm. Corolla white, ca. 7.5 mm, sparsely pilose, tube ca. 4 mm, upper lip ca. 2.5 mm, lower lip ca. 3.5 mm. Stamens included. Style included. Nutlets yellowish brown, ± globose, ca. 1.5 mm in diam., glabrous. Fl. Aug-Sep, fr. Sep-Oct.
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