Description from Flora of China
Aphanochilus flavus Bentham, Pl. Asiat. Rar. 1: 28. 1830.
Subshrubs erect, 0.6-2.6 m tall. Branches densely gray pubescent. Petiole 3-6 cm; leaf blade broadly ovate to sub-circular, 8-15 × 5.2-8.2 cm, adaxially pubescent especially on veins, abaxially glabrous, densely yellowish glandular, puberulent on veins, base rounded to shallowly cordate, oblique, margin mucronate- to serrate-crenate, apex abruptly caudate-acuminate. Spikes terminal and axillary, robust, 6-12 cm, pedunculate, densely gray pubescent; lower verticillasters widely spaced; bracts broadly ovate, ca. 3 × 3 mm, sparsely puberulent abaxially, margin ciliate, apex mucronate. Pedicel ca. 1 mm. Calyx campanulate, ca. 3.5 mm, pubescent, glandular outside, apex pubescent inside; teeth subulate-linear, apex linear; fruiting calyx tubular-campanulate, to 6.5 × 2.5 mm. Corolla yellow, ca. 6.5 mm, white villous, glandular outside, bearded annulate inside; tube ca. 4 mm, funnelform, to 2 mm wide at throat; upper lip emarginate; middle lobe of lower lip subcircular, margin erose; lateral lobes suboblong, rounded. Nutlets dark brown, oblong, ca. 1 mm. Fl. Jul-Oct, fr. Sep-Nov.
Open cultivated areas, valleys, forest margins, thickets; 1000-2900 m. Guizhou, Hubei, Sichuan, Yunnan, Zhejiang [India, Nepal].