Description from Flora of China
Herbs erect, ca. 50 cm tall, spreading villous, unbranched or short branched. Petiole 1.5-2.5 cm, strigose-villous; leaf blade ovate-lanceolate to oblong-lanceolate, 5-9 × 1.5-2.4 cm, sparsely villous, base cuneate-decurrent, margin coarsely serrate, apex acuminate. Spikes terminal, 4-7 cm, verticillasters 2- or 3-flowered; rachis densely strigose-villous; bracts reduced apically, pilose. Pedicel 1.5-2 mm, densely villous. Calyx campanulate, 6-6.5 mm, pilose outside, pilose annulate at throat; middle tooth of upper lip circular, ca. 2 mm wide, apex apiculate, lateral teeth obliquely triangular; lower lip teeth subulate, apically caudate-acuminate, ca. 2.5 mm. Corolla white, to 1.9 cm, pilose outside, tube ca. 9 × 1.5 mm; middle lobe ovate, ca. 4 × 2.8 mm, apex rounded; lateral lobes subulate-lanceolate, ca. 2.2 mm. Stamens 6-7 mm. Style ca. 1 cm. Nutlets ocher colored, obovoid, netted. Fl. Jul-Aug.
* Moist areas in broad-leaved forests; ca. 2000 m. Guizhou, Yunnan.