Description from Flora of China
Herbs robust. Stems to 1 m tall, base trailing, densely tawny stellate lanate or sparsely stellate villous, hairs early deciduous. Petiole 1.4-3.2 cm; leaf blade oblong-elliptic to narrowly oblong, 13-22 × 4-7 cm, adaxially densely tawny hirsute, abaxially tawny stipitate stellate especially on veins, base cuneate-attenuate to cuneate, margin shallowly serrate to irregularly denticulate, apex obtuse to acuminate. Cymes axillary, sessile, many flowered, dense; bracts leaflike, oblong to ovate-elliptic, 1.4-3.5 × 0.7-1.8 cm; bracteoles linear, 6-13 × 1-1.5 mm. Calyx campanulate, 14 × ca. 5 mm, conspicuously veined; teeth triangular-lanceolate, ca. 5 mm, apex linear-acuminate. Corolla purple-red, ca. 3.3 cm, densely stellate puberulent and glandular pilose; tube ca. 2 mm wide, apical half gradually dilated to ca. 8 mm at throat; upper lip erect, oblong, ca. 9 × 5.5 mm; lower lip ca. 11 × 8 mm, middle lobe circular, ca. 6.5 × 6.5 mm, margin irregularly undulate; lateral lobes ovate, ca. 6.5 × 4.5 mm. Nutlets oblong, triquetrous, ca. 4.5 × 3 mm, somewhat tawny, sparsely stellate villous on apical half. Fl. Jun-Aug, fr. Aug-Feb.
* Grassy slopes, sparse forests, fully exposed stony crevices; 1300-2100 m. Yunnan.