Description from Flora of China
Herbs biennial, ca. 1 m tall. Stems stout, 0.8-1.4 cm in diam. at base, hollow, hispid. Basal leaves lanceolate, to 35 cm, widest at middle, 4-6 cm, base attenuate, apex acuminate; lateral veins conspicuous; middle stem leaves ca. 15 × 2.5-3 cm, gradually reduced upward, hispid and strigose, hairs discoid at base. Inflorescences terminal and axillary, in more crowded panicles. Pedicel 5-10 mm, slender. Calyx lobes narrowly lanceolate, 0.9-1.2 cm × 1-1.5 mm, yellow hispid, short strigose. Corolla pink or purple-red, 1.1-1.4 cm, 1.5-2 mm wide at base, abruptly expanded at middle; throat 5-8.5 mm wide, strigose above middle outside, glabrous except for nectaries inside; nectary ca. 0.5 mm, pubescent; lobes broadly triangular, 1-1.5 × 2.5-4 mm, margin revolute. Filaments subulate, 7-9 mm, not decurrent, glabrous, inserted 3-4 mm above base in corolla tube; anthers laterally united, 7-8 mm, almost completely exserted, apex sterile, 1.5-2 mm. Style 1.4-1.6 cm, glabrous. Nutlets gray-brown, ca. 3 × 2 mm, shiny, black striate, obscurely tuberculate. Fl. and fr. Jul-Sep.
* Thickets, Quercus forests; 1600-3000 m. SW Sichuan.