Description from Flora of China
Aerides ampullacea Roxburgh, Fl. Ind., ed. 1832, 3: 476. 1832; Gastrochilus ampullaceus (Roxburgh) Kuntze; Oeceoclades ampullacea (Roxburgh) Lindley ex Voigt; Saccolabium ampullaceum (Roxburgh) Lindley.
Stems erect, 1-4 cm, stout. Leaves usually 3 or 4, nearly basal; leaf blade abaxially ± tinged reddish, adaxially yellowish green with purplish red spots, narrowly oblong, 5-20 × 1-1.5 cm, flat, conduplicate in basal half, thickly leathery, apex praemorse. Inflorescences often 2-4, erect, 5-7 cm, shorter than leaves, many flowered; peduncle and rachis pale vermilion; floral bracts ovate-triangular, ca. 1 mm, acute. Flowers uniformly deep pinkish red, opening widely, 1.5-1.8 cm in diam., anther cap and pollinia purplish; pedicel and ovary pale vermilion, 13-15 mm. Sepals and petals broadly ovate, 7-9 × 4-6 mm, obtuse; lip 3-lobed; lateral lobes erect, subtriangular, very small, obtuse; mid-lobe narrowly oblong, or ligulate, 6-7 × 1-2 mm, apex obtuse to acute, base with 2 calli at spur entrance; spur pale, cylindric, 8-9 × ca. 2.5 mm, apical half ± curved and slightly dilated. Column ca. 2 mm, thick. Fl. Apr-May. 2n = 38.
Epiphytic on tree trunks in broad-leaved evergreen forests; 1100-1500 m. S and SE Yunnan [Bhutan, India (including Andaman Islands), Laos, Myanmar, Nepal, Thailand].