Perennials, to 45 cm tall. Rhizomes apically to 1.2 cm in diam. Stems fascicled, hollow, sparsely hairy. Basal leaves scalelike. Upper leaves petiole to 4 cm, flattened, narrowly winged; leaf blade ovate to ovate-rhomboid, 2.5-7 cm, usually glabrous, base broadly cuneate to subtruncate, margin incised and double serrate. Thyrses subcapitate or subspicate, 3-10 cm, 1-3-whorled, glandular hairy; cymes 1-3-flowered. Pedicel to 1 cm. Calyx 5-7 mm, oblique, somewhat 2-lipped; lobes acute. Corolla yellow, 0.9-1.5 cm, outside glabrous; tube subcampanulate, ca. 6 mm, inside villous; lower lip middle lobe narrow, ligulate; upper lip longer than lower lip, inside villous, lobes orbicular, with overlapping margins. Stamens ca. 1/2 length of lower lip; staminode rounded to subreniform. Ovary ca. 3 mm. Style at least 2 X as long as ovary. Capsule narrowly ovoid, ca. 7 mm. Fl. May-Jul, fr. Aug.
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