Description from Flora of China
Saccolabium racemiferum Lindley, Gen. Sp. Orchid. Pl. 224. 1833; Aerides racemifera (Lindley) Wallich ex J. D. Hooker; Gastrochilus racemifer (Lindley) Kuntze; Sarcanthus pallidus Lindley; S. racemifer (Lindley) H. G. Reichenbach; S. yunnanensis Schlechter.
Stems erect, 5-20 cm, stout, 2-2.5 cm in diam., branching. Leaves distichous, flat, lorate, ca. 29 × 3-4 cm, obtuse and unequally bilobed. Inflorescence axillary, longer than leaves, many branched, laxly many flowered; floral bracts ovate-lanceolate, small, 1-2 mm. Flowers: sepals and petals yellow with brownish red spots, lip white; pedicel and ovary ca. 4 mm. Dorsal sepal suboblong, concave, ca. 3.5 × 2.5 mm, obtuse; lateral sepals slightly obliquely oblong, ca. 3.5 × 3 mm, base adnate to column foot, apex rounded. Petals oblong, ca. 3 × 2 mm, obtuse; lip lateral lobes erect, deltoid; mid-lobe spreading, deltoid, obtuse, with a keel running down to spur linking to rudimentary septum; spur conic, 2-2.5 mm; back wall callus inside spur ovate-triangular, base with papillate hairs, slightly bilobed. Column ca. 2.5 mm, winged; rostellum triangular; stipe narrowly lorate, margin inflexed; viscidium suborbicular, small; anther cap beaked at apex. Fl. Jun. 2n = 38.
Epiphytic on tree trunks in open forests; 600-1800 m. S and W Yunnan [Bhutan, India, Laos, Myanmar, Nepal, Thailand, Vietnam].