Description from Flora of China
Stems 35-80 cm tall, grooved, to 8 mm in diam. at base, retrorse hirsute, glabrescent. Petiole 2-8 cm, sparsely hirsute; leaf blade ovate-orbicular, 3.5-10 × 3-9 cm, adaxially sparsely hirsute, densely so on margin, abaxially glabrous, sparsely hirsute and stellate on veins, base shallowly cordate to cordate, margin serrate-crenate, apex acute. Verticillasters 3 or 4, ca. 2.5 cm in diam. in flower, to 4 cm in diam. in fruit, much shorter than petiole; bracts 1.3-1.5 cm, glabrous. Calyx apex sparsely stellate outside, glabrous inside; tube ca. 7 mm including spines in flower, to 1 cm in fruit; lobes deltoid, apex extending directly into a long hooked spine. Corolla white; tube ca. 5 mm, ± villous at throat inside; upper lip erect, galeate, entire, densely villous; lower lip spreading, villous outside, glabrous inside. Ovary densely stellate. Nutlets brownish, ca. 4 × 2.5 mm, truncate, apex stellate. Fl. Oct-Nov, fr. Nov.
* Streamsides in dense forests; 2000-2400 m. Xizang, Yunnan.