Herbs perennial, rhizomatous. Stems 20-55 cm tall, erect, base ca. 2 mm wide, dark purple when dry, subglabrous below middle, sparsely antrorse hooked pubescent on angles and nodes. Petiole 5-12 mm; leaf blade ovate to elliptic-ovate, 6-7.2(-8) × 2.5-4 cm, densely golden glandular, adaxially glabrous to very sparsely pubescent, abaxially sparsely pubescent on midrib and veins, base rounded to broadly cuneate, margin shallowly dentate, apex acute. Racemes terminal, (6-)8-11.5(-16) cm; bracts subsessile, basal ones oblong, 1.2-2 cm, margin few denticulate, apical ones ca. 1 cm, narrower, margin entire. Pedicel ca. 2.5 cm. Calyx ca. 4 mm, to 7 mm in fruit, veins and margin pubescent; scutellum ca. 2.5 mm, to ca. 5 mm in fruit. Corolla purple-blue, 2.5-2.7 cm, glandular pubescent; tube ca. 1.8 cm, base bent, throat to 5.5 mm wide; middle lobe of lower lip triangular ovate, ca. 5 mm wide; lateral lobes ovate, ca. 2.5 mm wide. Nutlets brown, ovoid-ellipsoid, ca. 1.5 × 1.25 mm, tuberculate, adaxially umbonate at middle. Fl. May, fr. Jun.
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