Description from Flora of China
Teucrium japonicum Willdenow var. pilosum Pampanini, Nuovo Giorn. Bot. Ital., n.s. 17: 711. 1910.
Herbs perennial, stoloniferous. Stems erect, simple or occasionally branched apically, 50-100 cm tall, densely spreading white villous or yellow villous, hairs to 3 mm. Petiole 0.4-1 cm, spreading villous; leaf blade ovate-lanceolate to oblong-lanceolate, 5-8(-12) × 1.5-2.5(-5) cm, adaxially with villous midrib otherwise appressed pubescent and unevenly pubescent, abaxially with villous veins, base truncate to subcordate, margin irregularly double serrulate, apex short acuminate to acuminate. Spikes terminal, 3.5-7(-15) mm, villous, verticillasters 2-4-flowered; bracts linear-lanceolate, villous. Pedicel ca. 1.5 mm, villous. Calyx campanulate, ca. 4 × 3 mm, villous, yellow glandular outside; upper 3 teeth triangular, lower 2 triangular-subulate. Corolla reddish, 1.2-1.5 cm; tube less than 1/3 as long as corolla; limb straight, middle lobe obovate-orbicular, to 5.5 mm in diam., apex apiculate; lateral lobes ovate-oblong, apically acute. Nutlets unknown. Fl. Jul-Aug.
* Forest margins, slopes, river banks; 300-2500 m. Guangxi, Guizhou, Hubei, Hunan, Jiangxi, Sichuan, Zhejiang