Herbs perennial. Rhizomes prostrate, 1-1.5 mm in diam., much branched. Stems numerous, erect, 6-25 cm tall, antrorsely pubescent on angles, sometimes subglabrous, mostly unbranched. Petiole less than 1 mm; leaf blade ovate-lanceolate basally, linear upward, 1-2.1 cm × 2.2-5.5(-7) mm, herbaceous, sparsely puberulent, impressed glandular abaxially, base rounded to broadly cuneate, margin entire and slightly involute, apex obtuse to rounded. Racemes terminal, 3-19 cm; bracts linear, gradually reduced upward. Pedicel 1.2-2.5 mm, glandular pubescent. Calyx purplish, 1.5-2.5 mm, to 4 mm in fruit, glandular pubescent outside; scutellum circular, ca. 1 mm, to 2.5 mm in fruit. Corolla purple to blue-purple, 1.2-1.7 cm, glandular pubescent outside, mostly glabrous inside, limb partly white pilose; tube bent near base; middle lobe of lower lip ovate, apex emarginate; lateral lobes triangular-ovate, margin revolute. Nutlets black-brown, subglobose, ca. 1.8 mm in diam., tuberculate, adaxially umbonate near base. Fl. Apr-Oct, fr. Jun-Oct.
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