云北石豆兰 yun bei shi dou lan

Rhizome creeping, roots spreading. Pseudobulbs close, subovoid, 5-11 mm, 4-6 mm in diam., with a terminal leaf. Leaf sessile; blade oblong, 1.4-3 × 0.4-1.1 cm, subleathery, apical margins scabrous, apex acute. Scapes 2 or 3, from base of pseudobulb, ca. 1.3 cm, with 2 or 3 tubular sheaths 2-3 mm; raceme shortened, umbel-like, often 4- or 5-flowered; floral bracts ovate-lanceolate, 3-4 mm, apex acute. Pedicel and ovary 2.5-3 mm. Flowers not resupinate, yellowish, with red lip and apical part of sepals. Sepals free, 3.3-4 × 1.6-2 mm, 3-veined, apex acuminate; dorsal sepal ovate; lateral sepals ovate-lanceolate, margins ± incurved. Petals ovate-lanceolate, 1.5-2 × ca. 0.7 mm, 1-veined, apex acute; lip attached to end of column foot, immobile, slightly recurved, ligulate, ca. 2.8 mm, fleshy, adaxially minutely papillate, grooved at base. Column ca. 1.3 mm, foot ca. 2 mm, with free part ca. 1 mm; stelidia conspicuous, subulate, ca. 0.8 mm; anther cap subglobose, apex mucronate. Capsule ovoid, ca. 6 mm, ca. 3 mm in diam. Fl. Jul.

● Tree trunks in forests; ca. 2000 m. SW Yunnan.