Herbs, to 60 cm tall. Stems densely glandular hairy, white pithed or sometimes hollow. Leaves ovate, ovate-oblong, or oblong-lanceolate, to 9 X 5 cm, pubescent, base often asymmetrical and rounded, subtruncate, subcordate, or rarely broadly cuneate, margin variously toothed. Thyrses terminal or sometimes on lateral branches, to 30 cm; cymes widely spaced, 3-7-flowered; peduncle to 1.5 cm, glandular hairy; bracts small. Pedicel usually 4(-10) mm, glandular hairy. Calyx ca. 4 mm, subglabrous; lobes ovate, apex obtuse. Corolla green to yellow-green, ca. 8 mm; tube oblong-globose, ca. 4 mm; lower lip middle lobe slightly shorter than lateral lobes; upper lip ca. 1 mm longer than lower lip, lobes ovate, with overlapping margins. Stamens slightly shorter than lower lip; staminode fanlike to transversely oblong, wider than long. Ovary ca. 2.5 mm. Style 3-4 mm. Capsule ovoid, 5-9 mm. Fl. May-Jul, fr. Jul-Sep.
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