Didissandra speciosa Hemsley in F. B. Forbes & Hemsley, J. Linn. Soc., Bot. 26: 228. 1890; Didymocarpus speciosus (Hemsley) H. Léveillé.

Plants stemless. Petiole 1-3 cm, densely grayish to brownish puberulent; leaf blade narrowly elliptic to oblanceolate or ovate, 3-6(-8) X 0.8-2.3(-3.2) cm, white appressed pubescent, base often oblique, narrowly cuneate, margin serrate, apex acute; lateral veins 4 or 5 on each side of midrib, adaxially inconspicuous, abaxially slightly more conspicuous. Cymes 1-5-flowered; peduncle 4-9(-11) cm, brown pubescent; bracts 2, linear to lanceolate, 3-8 X 1-3 mm, outside appressed pubescent, inside glabrous, margin entire. Calyx segments lanceolate to ovate, 3-6 X 1-3 mm, outside brownish pubescent, margin entire, veins indistinct. Corolla purple-red, inside abaxial lip with 2 yellow or purple spots, 3.8-5.3 cm, outside glabrescent to sparsely pubescent, inside glabrous; tube 2.9-3.6 X 1.3-1.9 cm; adaxial lip 5-9 mm, lobes oblong to broadly triangular, 4-8 X 2-7 mm, apex obtuse to acute; abaxial lip 1.2-1.7 cm, lobes oblong to broadly triangular or semiorbicular, 4-10 X 4-7 mm, apex obtuse to acute. Adaxial stamens adnate to corolla ca. 0.5 mm above base, 1.5-2.4 cm, abaxial ones adnate to corolla ca. 1 mm above base, 2-3 cm; filaments sparsely pubescent; anthers reniform, thecae not confluent; staminode 3-4 mm. Pistil 1.6-2.5 cm; ovary glandular pubescent. Style 2-3 mm, glandular puberulent. Capsule 6-6.8 cm, glabrescent. Fl. Jun-Aug, fr. Jul-Sep.

* Shady, damp rocks on slopes; 300-1600 m. W Hubei, SW Hunan, E Sichuan.