Description from Flora of China
Ania latifolia Lindley, Gen. Sp. Orchid. Pl. 130. 1831; Eulophia hastata Lindley; Mitopetalum latifolium (Lindley) Blume; Tainia cordata J. D. Hooker; T. elliptica Fukuyama; T. hastata (Lindley) J. D. Hooker; T. khasiana J. D. Hooker; T. shimadae Hayata var. elliptica (Fukuyama) S. S. Ying.
Pseudobulbs close, cylindric-ovoid, ca. 7 cm, base 1-1.5 cm in diam., usually ± covered with membranous sheaths. Petiole 8-30 cm, slender; leaf blade elliptic or elliptic-lanceolate, plicate, 18-32 × 5-7 cm, papery, acuminate. Inflorescence erect; peduncle 20-80 cm, with 3 tubular sheaths 5-8 cm; rachis deep brown, ca. 20 cm, laxly many flowered; floral bracts narrowly lanceolate, ca. 2 mm. Flowers fragrant; pedicel, ovary, sepals, and petals dark brown, lip yellow, column yellow, anther cap with 2 purplish red appendages; pedicel and ovary ca. 1.3 cm, ovary dilated, clavate. Dorsal sepal narrowly oblong, 11-13 × 1.7-2 mm, 3-veined, obtuse; lateral sepals narrowly falcate-oblong, ca. 12 × 2 mm, base adnate to column foot forming a short mentum. Petals similar to lateral sepals, 12-13 × 2-3 mm, 3-veined, subacute; lip elliptic to ovate, 8-12 × 4-9 mm, normally 3-lobed; lateral lobes erect, ovate-triangular, 5-7 mm wide when flattened, acute; mid-lobe suborbicular or obovate, ca. 4 mm wide, apex emarginate; disk with 3 lamellae extending to apex of mid-lobe, lateral ones broader and arcuate. Column arcuate, ca. 7 mm, distal margin entire to slightly denticulate; foot ca. 2 mm. Fl. Mar. 2n = 32, 40.
Tainia latifolia is represented in China by subsp. latifolia; T. latifolia subsp. elongata (J. J. Smith) H. Turner, from Sumatra and Java, is a smaller plant with shorter pseudobulbs and a denticulate to slightly erose distal column margin.
Wooded slopes; 700-1400 m. Hainan, C and S Taiwan, S and SW Yunnan [Bangladesh, Bhutan, NE India, Laos, Myanmar, Thailand, Vietnam].