Description from Flora of China
Chirita dryas Dunn; C. sinensis var. angustifolia Dunn; C. sinensis var. bodinieri H. Léveillé; Didymocarpus sinensis (Lindley) H. Léveillé; Roettlera sinensis (Lindley) Kuntze.
Perennials, stemless. Rhizome internodes inconspicuous. Leaves basal, opposite or ternate; petiole 2-8(-19) cm X 2-5 mm; leaf blade ovate to elliptic, lanceolate, oblong, or suborbicular, sometimes falcate, 4-20 X 3.5-6.5(-9) cm, papery, appressed pubescent and pilose, eglandular, base attenuate to cordate, margin repand to crenate, rarely dentate to serrate, apex acuminate to rounded; lateral veins 3-5 on each side of midrib, inconspicuous. Cymes 1-12-flowered; peduncle 12-32 cm, spreading villous to pilose; bracts 2, free, ovate to lanceolate, 1-4 X 0.4-1.6 cm, pubescent to villous, margin entire or crenulate to serrulate, apex acute. Pedicel 0.8-2.5 cm, pubescent to pilose and glandular puberulent. Calyx 5-sect from base; segments equal, lanceolate to narrowly ovate, 3-6 X 1-2.5 mm, outside puberulent to pilose, inside glabrous, margin entire, apex acute to rounded. Corolla purple to white, inside tinged purple with 2 yellow longitudinal lines adaxially of tube, (2-)2.7-4.6 cm, outside sparsely pubescent to pilose, inside puberulent only on purple spot of adaxial lip; tube tubular to broadly funnelform, often gibbous abaxially, (1.5-)2-3.5 X 1.1-1.5 cm; adaxial lip 4-6 mm; abaxial lip 0.7-1.5 cm. Filaments 0.7-1.4 mm, puberulent; anthers fused by entire adaxial surfaces, ca. 3 mm, glabrous to pubescent; staminodes 2, 3-6 mm. Pistil 1.8-2.5 cm, puberulent to pilose and glandular pubescent; ovary 1-1.8 cm. Stigma obtrapeziform to oblong, 2-3 mm, 2-lobed. Capsule at ca. 90 to peduncle, 4-7.5 cm. Fl. May-Feb, fr. Aug-Feb.
* Wet shady places by streams or on rocks in valleys; 100-500 m. W Guangdong.