Herbs perennial, rhizomatous. Rhizomes robust. Stems erect, 3 0-45 cm tall, angles slightly winged, purplish, with 4-9 pairs of leaves, internodes to as long as leaves. Petiole 4-7 mm; leaf blade ovate-oblong to oblong-lanceolate, ca. 5-8 × 2-3.5 cm, membranous or thin papery, base shallowly cordate, sometimes obliquely so, margin irregularly crenate, apex caudate-acuminate. Racemes axillary and terminal, 6-14-flowered, ca. 4-10 cm, axillary racemes with 2-4 pairs of reduced lower leaves; bracts gradually reduced upward, sessile, caudate-acuminate, margin ciliolate upward. Pedicel ca. 2.5-3 mm, densely glandular pubescent. Calyx ca. 2 mm, pubescent, to 3.5 mm in fruit; scutellum ca. 1.2 mm, to 2.5 mm, conspicuously netted in fruit. Corolla purplish, ca. 2.2 cm, sparsely glandular puberulent outside, glabrous inside; tube base saccate-spurred, to 3 mm wide, throat abruptly dilated to 5 mm wide; upper lip subcircular; middle lobe of lower lip triangular-ovate, to 5 mm wide, apex emarginate; lateral lobes ovate to circular. Nutlets unknown. Fl. Jun-Aug.
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