Description from Flora of China
Mimulus violaceus Azaola ex Blanco, Fl. Filip., ed. 2, 357. 1845; Torenia exappendiculata Regel; T. peduncularis Bentham ex J. D. Hooker; T. violacea var. chinensis T. Yamazaki.
Herbs, 8-35 cm tall. Stems erect or somewhat decumbent, branched near base. Leaves decreasing in size upward; petiole 0.5-2 cm; leaf blade ovate to narrowly ovate, 2-4 X 1-2 cm, villous, base cuneate to somewhat truncate, margin shallowly serrate, apex acuminate. Flowers in terminal fascicles or solitary in leaf axils, rarely in racemes. Pedicel ca. 1.5 cm, to 3 cm in fruit. Calyx purple-red, oblong-fusiform, 1.3-1.7 cm X 6-8 mm, to 2 X 1 cm in fruit, base rounded and slightly decurrent, 5-winged and wings to 2.5 mm wide; lobes 5. Corolla pale yellow or white, 1.5-2.2 cm, exceeding calyx by 1-2 mm; lower lip lobes with a blue patch, center of middle lobe with an additional yellow patch, ca. 3 X 4 mm, subequal; upper lip suberect, suborbicular, ca. 6 mm in diam. Stamens unappendaged. Capsule 1.1-1.4 cm. Seeds yellow, ca. 0.4 mm. Fl. and fr. Aug-Nov.
Grassland on mountain slopes, forests, along trails; 200-2000 m. Guangdong, Guangxi, Guizhou, Hubei, Jiangxi, Sichuan, Taiwan, Yunnan, Zhejiang [Bhutan, Cambodia, India, Indonesia (Java), Laos, Malaysia, Philippines, Sikkim, Thailand, Vietnam].