Description from
Flora of China
Aeschynanthus linearifolius C. E. C. Fischer var. angustissimus W. T. Wang, Acta Phytotax. Sin. 17: 110. 1979.
Stems ca. 40 cm, rust-brown pubescent. Leaves opposite; petiole 2-3 mm; leaf blade linear to narrowly oblanceolate, 6.5-12.2 cm X 4-7 mm, leathery, glabrous, adaxially drying wrinkled, abaxially sparsely punctate, base attenuate, margin entire, apex attenuate; lateral veins invisible. Cymes axillary, 1-4-flowered; peduncle 5.2-10 cm; bracts persistent, red, lanceolate, 1.6-1.8 cm X 5-8 mm. Pedicel 0.8-1.8 cm, glabrous. Calyx red, 5-sect from base; segments narrowly oblong to lanceolate-oblong, 1.2-1.8 cm X 3.2-4.5 mm, outside puberulent. Corolla red, ca. 3.2 cm, outside glabrous, inside sparsely glandular puberulent apically, without tufts of hairs, mouth not oblique; limb indistinctly 2-lipped, lips nearly equal, ca. 5 mm. Stamens exserted; filaments 1.2-1.5 cm; anthers coherent in pairs at apex, ca. 2 mm; staminode ca. 2 mm. Pistil ca. 2.4 cm; ovary glabrous. Style ca. 2 mm, glandular puberulent. Capsule 4.8-7 cm. Seeds unknown. Fl. Aug.
* On trees and rocks in broad-leaved forests; ca. 2300 m. SE Xizang (Mêdog Xian).