Herbs perennial. Rhizomes with scalelike leaves. Stems erect or ascending, 15-30 cm, slender, sparsely pubescent. Leaves sessile upward; petiole 2-5 mm; leaf blade broadly triangular-ovate, 5-12 × 4-8 mm, base subcordate to broadly cuneate, margin dentate, apex apiculate. Verticillasters in dense, oblong-ovoid or cylindric, continuous terminal spikes, sometimes basal 1 or 2 verticillasters interrupted, 2.5-4 cm; bracts obovate to narrowly ovate, 4-6 × 2-3.5 mm, membranous, pubescent, base cuneate, margin entire and villous, apex acute or acuminate; bracteoles lanceolate-linear, margin silky pubescent. Pedicel ca. 2 mm. Calyx obconical, 5-7 × 1-1.5 mm, sparsely pubescent; teeth subequal or anterior 2 slightly shorter, narrowly triangular, margin densely sericeous-villous. Corolla bluish, 1.2-1.4 cm, sparsely pubescent; tube narrow, throat dilated; upper lip 3.5-4 × 3-3.5 mm; middle lobe of lower lip inversely cordate, ca. 2 × 3 mm. Nutlets brown, broadly ellipsoid, 1-1.5 × 0.5-0.7 mm.
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