Herbs, to 50 cm tall, often rhizomatous. Stems suberect or ascending, subquadrangular, pubescent to subglabrous, rooting from basal nodes. Petiole to 5-10 mm, pubescent; leaf blade narrowly triangular to narrowly triangular-ovate, 2-3.5 X 1-2 cm, appressed hairy, base broadly cuneate, margin 11-25-toothed, apex acute. Flowers axillary and solitary or in 3-5-flowered racemes; bracts narrow. Pedicel 2-8 mm, to 16 mm in fruit, pubescent. Calyx to 9 mm, lobed to base; lobes linear, to 6 mm, subequal, hirsute along midrib, apex acute. Corolla to 1-1.2 cm; lower lip ca. 6.5 mm, 3-lobed, lateral lobes oblong and ca. 2/3 as long as middle lobe; upper lip triangular, ca. 3.5 mm, apex truncate and subemarginate. Filaments of anterior stamens basally with a clavate appendage ca. 0.5 mm; anthers mucronate. Stigma lamellate. Ovary glabrous. Capsule ovoid, as long as persistent calyx. Fl. Jul.

* Guangxi (Yaoshan), Guizhou.