4. Tainia angustifolia (Lindley) Bentham & J. D. Hooker, Gen. Pl. 3: 515. 1883.
狭叶带唇兰 xia ye dai chun lan
Ania angustifolia Lindley, Gen. Sp. Orchid. Pl. 129. 1831; Ascotainia angustifolia (Lindley) Schlechter; Eulophia evrardii Guillaumin; Mitopetalum angustifolium (Lindley) Blume; Nephelaphyllum evrardii (Guillaumin) Tang & F. T. Wang.
Pseudobulbs ovoid, to 2 cm in diam., ± covered with sheaths. Petiole 20-30 cm, slender, articulate near middle, base with 2 tubular sheaths; leaf blade oblong or narrowly elliptic, ca. 30 × 3-5.5 cm, apex shortly acuminate. Inflorescence erect; peduncle ca. 45 cm, with 3 or 4 tubular sheaths below; rachis 7-15 cm, laxly few flowered; floral bracts lanceolate, ca. 7 mm, membranous. Flowers not opening widely, yellowish green; lip whitish, tinged with dark purple, mid-lobe dark purple, apical margin white, lamellae deep purple, column whitish, upper part purplish, anther cap brownish green; pedicel and ovary ca. 1 cm. Sepals similar, oblong, 15-17 × 4.5-5 mm, 5-veined, acute; lateral sepals adnate to column base. Petals elliptic, 13-15 × 3.5-4.5 mm, 5-veined, acute; lip oblong or suboblong, 15-17 mm, 3-lobed; lateral lobes erect, embracing column, triangular-lanceolate, ca. 1 mm wide, acuminate; mid-lobe nearly oblate, ca. 4 mm wide, rounded; disk with 5 lamellae extending to mid-lobe; lamellae parallel to each other, highly raised and undulate or denticulate on mid-lobe; spur slightly flattened, ca. 4 × 3 mm, obtuse and slightly concave. Column ca. 1 cm × 5 mm, broadly winged; rostellum slightly decurved, suborbicular. Fl. Sep-Oct.
Wooded slopes; 500-1200 m. SW Guizhou, S Yunnan [Myanmar, Thailand, Vietnam].