Description from Flora of China
Shrubs erect. Stems simple, ca. 1.2 m tall, apically herbaceous, flexuous, densely tawny stellate tomentose. Petiole 2.2-4.5 cm; leaf blade ovate-oblong to oblong, 13-17 × 6.5-7 cm, adaxially stellate hirtellous, abaxially densely gray stellate tomentose, base obtuse to rounded, margin irregularly coarse dentate, apex acuminate. Cymes chestnut to purple-brown when dry, inserted at stem base, 2-3 cm; peduncle 3-10 mm; bracts and bracteoles linear to capillary, curved, 1-1.2(-1.5) cm × 0.3-1.5 mm. Calyx narrowly campanulate, 1.2-1.5 cm, ca. 3 mm in diam.; teeth 7-8 mm, basally triangular, apically capillary, sparsely stipitate stellate villous and minutely hispid. Corolla yellow, ca. 3.5 cm, puberulent; tube incurved, base ca. 1.3 mm wide, gradually dilated for 3/4 its length, abruptly dilated to 7 mm wide at throat; upper lip subcircular, ca. 8 × 6 mm; lower lip ca. 10 mm, puberulent; middle lobe obcordate, apex emarginate, ca. 4 × 5.5 mm; lateral lobes subcircular, ca. 2.5 mm in diam. Nutlets unknown. Fl. Jul-Aug.
* Densely forested valleys; ca. 1100 m. Guangxi.