Herbs perennial. Stems slender, 30-60 cm tall, pubescent. Petioleslender, 1-4 cm; leaf blade triangular-ovate, 1.5-6.4 × 1.5-2cm, hirtellous, adaxially olive green, abaxially greenish, basecordate, margin crenate to dentate, apex acute. Cymes axillary,sometimes helicoid, in loose terminal panicles; bracts subulate,minute, ca. 2.5 mm. Calyx tubular, minutely hispid, ca. 4 mm,veins elevated; teeth subequal, lanceolate, ca. 1 mm. Corollapurple, ca. 8 mm, pubescent, glabrous inside; tube ca. 0.8 mmin diam. at base, narrowest part ca. 2 mm, abruptly dilated intothroat ca. 3 × 3 mm; upper lip ca. 1.2 mm, 2-lobed; lowerlip longer, middle lobe subcircular, ca. 2.5 × 2.2 mm, marginundulate. Style exserted. Nutlets dark purple-brown, ovoid, triquetrous,ca. 0.8 × 0.6 mm, glabrous. Fl. and fr. Apr-Oct.
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