Description from Flora of China
Herbs, 14-20 cm tall. Stems erect, woody, quadrangular, narrowly winged on angles, sparsely hirsute; branches spreading at 45° then ascending. Leaves sessile or short petiolate; leaf blade thick, triangular-ovate to ovate-lanceolate, 1.5-2.8 X 0.5-1.4 cm, abaxially hairy on veins, adaxially sparsely hirsute, base broadly cuneate to subrounded, margin with 12-18 appressed saw-teeth, apex acute. Flowers axillary, solitary or few in short umbellate fascicles. Pedicel 1.5-2.5 cm, hirsute. Calyx ca. 1 cm, lobed to base; lobes linear-lanceolate, apex narrowly acuminate, midrib raised with dense rough hairs these dilated at base. Corolla ca. 8 mm; lower lip ca. 5 mm, lobes rounded, apex subemarginate; upper lip ovate, margin entire. Fertile stamens 2, posterior; filaments short; anthers large. Sterile stamens 2, anterior; filaments to 2 mm, without appendages. Capsule oblong-ovoid, ca. 2/3 as long as persistent calyx. Seeds brown.
* Shady places of valleys or trailsides; low elevations. Guangxi (Gui Xian, Xing'an).