Bulbophyllum omerandrum

Native to north Fujian, north Guangdong, Guangxi, western Hubei, north Hunan and Zhejiang provinces of China, and Taiwan. 

Cool growing, miniature

Link to a photo on iNaturalist

Description from the Flora of China: Rhizome creeping, ca. 2 mm in diam., rooting from base of pseudobulbs. Pseudobulbs 1.5-4 cm apart on rhizome, ovoid-globose, 1-2 cm, 5-8 mm in diam., with a terminal leaf. Leaf subsessile; blade oblong, 1.5-8.5 × 0.8-1.4 cm, thickly leathery, base cuneate, apex obtuse and retuse. Scape from base of pseudobulb, erect, usually 5-6 cm; umbel or condensed raceme 1-3-flowered; peduncle slender, ca. 1 mm in diam., sparsely with 2 or 3 tubular sheaths; floral bracts ovate, cymbiform, 7-8 mm. Pedicel and ovary 1.5-2 cm. Flowers yellow. Dorsal sepal ovate, 10-14 × 7-8 mm, apex obtuse and slightly hairy; lateral sepals usually free, lanceolate, 20-33 × 4-5 mm, base adnate to column foot, margin entire, twisted near base and divergent, apex obtuse. Petals ovate-triangular, 5-7 × 4-5 mm, apical margins fimbriate-ciliate, apex purplish brown, obtuse and apiculate; lip recurved, ligulate, ca. 7 mm, fleshy, base attached to end of column foot by a mobile joint, apex obtuse, ± ciliate, sparsely finely papillate on both apical sides. Column ca. 4 mm, with crescent-shaped wings at middle; foot curved, ca. 5 mm, with free part ca. 2 mm; stelidia deltoid, ca. 1 mm; anther cap shortly fimbriate margined. Fl. Mar-Apr.