Description from Flora of China
Incarvillea oblongifolia Roxburgh, Fl. Ind., ed. 2, 3: 113. 1832; Aeschynanthus oblongifolius (Roxburgh) G. Don; Babactes oblongifolia (Roxburgh) A. P. de Candolle; Chirita acuminata R. Brown; Roettlera oblongifolia (Roxburgh) Kuntze.
Perennials. Rhizomes unknown. Stems erect, 45-90 cm, rust-brown puberulent apically. Leaves to 8 or more, along stem, opposite, widely spaced; petiole 1.6-4.5 cm X 1.5-2 mm; leaf blade oblique, ovate to elliptic or oblong, 8-18 X 5-10 cm, papery, densely puberulent, densely yellow glandular, base oblique, cuneate to cordate, margin denticulate, apex acuminate; lateral veins 8-13 on each side of midrib, conspicuous. Cymes 5-7-flowered; peduncle 1.8-3.8 cm, densely rust-brown puberulent; bracts 2, free, narrowly ovate, ca. 6 X 2-3 mm, densely puberulent, margin denticulate, apex acute. Pedicel 0.5-1.5 cm, densely rust-brown puberulent. Calyx 1.1-1.4 cm, 5-lobed from above middle; tube 7-9 mm; lobes equal, triangular, 3-5 mm, outside densely puberulent and glandular, inside glabrous with very short hairs near apex, margin entire, apex acute to acuminate. Corolla white with yellow at throat, 4-4.3 cm, outside sparsely puberulent, inside glabrous; tube funnelform, 2.7-3 X ca. 1.2 cm; adaxial lip ca. 7 mm; abaxial lip ca. 1.2 cm. Filaments ca. 1.3 cm, glabrous; anthers fused by entire adaxial surfaces, ca. 1.5 mm, glabrous; staminodes 3, central ca. 0.6 mm, laterals ca. 6 mm. Pistil ca. 2.5 cm, puberulent; ovary ca. 2 cm. Stigma obtrapeziform to obdeltoid, ca. 2-5 mm, emarginate or 2-lobed. Capsule erect, 5-7 cm. Fl. Aug-Sep, fr. Sep-Oct.
After publication of the family treatment for the Flora of China,
this was treated as Henckelia oblongifolia (Roxburgh) D. J. Middleton & Mich. Möller (Taxon 60: 776. 2011).
Montane evergreen broad-leaved forests; 800-1200 m. SE Xizang (Mêdog Xian), NW Yunnan (Gongshan Xian) [NE India, N Myanmar].