Herbs to 30 cm tall, perennial. Stems 4-angled, basally usually rooting at nodes, sulcate, bifariously pubescent. Petiole 3-13 mm, pubescent; leaf blade ovate, (0.8-)1.5-6.5 × (0.4-)1-4 cm, thickly papery, abaxially glabrous, adaxially glabrous or pilose on veins, secondary veins 4 or 5 on each side of midvein, base cuspidate to rounded, margin subundulate, apex acute. Spikes often terminal or rarely axillary in apicalmost leaf axil, 1.5-3 cm, interrupted; peduncle 1-2.5 cm; rachis bifariously pubescent; bracts broadly obovate to sometimes circular or ovate, 3-5 × 2-4 mm, abaxially sparsely gland-tipped puberulent, apex cuspidate; bracteoles narrowly triangular, ca. 2 × 1 mm, abaxially pubescent, margin ciliate, apex acute. Calyx 2-3 mm, 5-lobed almost to base; lobes linear. Corolla yellow with purplish spots, 1.2-1.4 cm, outside pubescent; lower lip palate 3-lobed, lobes triangular and 1-2 mm; upper lip 4-5.5 mm, apex emarginate. Staminal filaments 2.5-3 mm, glabrous; anther thecae ca. 1.5 mm, lower one spurred at base. Ovary glabrous; style 5-8 mm, subglabrous. Capsule not seen. Fl. Sep-Dec.
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