Description from Flora of China
Chirita grandiflora Wallich; Didymocarpus urticifolius (Buchanan-Hamilton ex D. Don) Wonisch; Gonatostemon boucheanum Regel; Henckelia urticifolia (Buchanan-Hamilton ex D. Don) A. Dietrich; H. wallichiana A. Dietrich; Roettlera urticifolia (Buchanan-Hamilton ex D. Don) Kuntze.
Perennials. Rhizome unknown. Stems erect, 30-80 cm, sparsely puberulent. Stem leaves to 8 or more, widely spaced, unequal in a pair; petiole 0.7-6.5 cm X 1-2 mm; leaf blade elliptic to broadly elliptic, rarely ovate or obovate, 4-11(-17) X 2.2-6(-10) cm, papery, puberulent, eglandular, abaxially mostly along veins, base oblique, broadly cuneate to rounded, margin dentate to serrate, apex acute to abruptly acuminate; lateral veins 5-10 on each side of midrib, conspicuous. Cymes 1- or 2-flowered; peduncle 1.5-5.5 cm, puberulent to sparsely puberulent; bracts 2, free, lanceolate to ovate, 6-16 X 3-9 mm, nearly glabrous to pubescent, margin subentire to denticulate, apex acute. Pedicel 0.8-2.2 cm, puberulent or pilose to glabrous. Calyx 2.5-3.5 cm, 5-lobed; tube 1-1.5 cm; lobes slightly unequal, narrowly triangular to lanceolate, 1-2 cm, outside sparsely puberulent to villous near base, inside glabrous, margin entire, apex attenuate. Corolla purple to pink, 5.5-6 cm, outside sparsely puberulent to sparsely pilose, inside glabrous; tube narrowly funnelform, 3.5-4 X 1.5-2 cm; adaxial lip ca. 1.5 cm; abaxial lip ca. 2.2 cm. Filaments ca. 1.5 cm, glabrous; anthers fused by entire adaxial surfaces, ca. 3 mm, glabrous; staminodes 2, 6-7 mm. Pistil 3.2-3.6 cm, puberulent to sparsely pubescent; ovary ca. 2 cm. Stigma narrowly obtrapeziform, ca. 7 mm, deeply 2-lobed. Capsule often at under 90 to peduncle, 8-15 cm. Fl. Jul-Sep, fr. Sep-Oct.
Forests, valley streamsides; 1300-1700 m. SE Yunnan (Lüchun Xian, Pingbian Xian) [Bhutan, NE India, N Myanmar, Nepal, Sikkim].