Description from Flora of China
Chelonopsis benthamiana Hemsley; C. deflexa (Bentham) Diels; C. deflexa var. matsudae Kudo.
Herbs erect. Stems densely retrorse hirtellous. Leaves subsessile; leaf blade long lanceolate, 8-22 × (0.8-)1.5-5 cm, base attenuate-cuneate to shallowly cordate, margin coarsely to shallowly serrate, apex acuminate to caudate-acuminate. Cymes (5-)7-11-flowered, ca. 2.5 × 3 cm including 6-12 mm peduncle, densely, retrorse hirtellous; bracts and bracteoles linear, 1-2 mm. Pedicel 4-6 mm. Calyx ca. 4.5 × 3.5 mm, posterior tooth smallest. Corolla purplish red, ca. 3.3 cm, sparsely hirsute; upper lip ca. 3.5 × 4.5 mm, apex rounded; middle lobe of lower lip broadly ovate, ca. 6.5 × 9 mm. Fl. Jul-Sep, fr. Sep-Nov.
* Wet areas in dense forests, thickets, open slopes; 500-1200 m. Fujian, Guangdong, Guangxi, Guizhou, Hubei, Jiangxi, Sichuan, Taiwan.