Herbs perennial, rhizomatous. Stems ca. 36 cm tall, erect, base ca. 1.5 mm in diam., usually branched upward. Petiole 0.5-1.8 cm; leaf blade triangular to triangular-ovate, 1.5-3 × 1.1-2.4 cm, membranous to herbaceous, base truncate-cuneate, margin incised-dentate to shallowly dentate, apex acute. Racemes terminal, 5-9 cm; bracts ovate, rhombic, or spatulate, 3-4 mm, sparsely pubescent, margin ciliolate. Pedicel 2-3 mm, densely glandular puberulent, pubescent. Calyx ca. 2 mm, to 4 mm in fruit, glandular puberulent outside, pubescent; scutellum ca. 1 mm, to 2 mm in fruit. Corolla blue, 1.2-1.3 cm, sparsely puberulent outside, glabrous inside; tube zigzag, ca. 5-6 mm, base bent, throat ca. 4 mm wide; middle lobe of lower lip broadly oblong-ovate, to 7 mm wide, apex emarginate; lateral lobes triangular, ca. 3 mm wide. Nutlets chestnut brown, ovoid, ca. 1 × 0.7 mm, tuberculate, adaxially umbonate near base. Fl. Aug, fr. Sep-Oct.
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