勐海石豆兰 meng hai shi dou lan

Plants small. Rhizome creeping. Pseudobulbs contiguous, nearly flattened globose, broader than long, 3-4 mm in diam., with a terminal leaf. Leaf subsessile; blade ovate-lanceolate or oblong-ligulate, 4-10 × 2-3 mm, leathery, base contracted, apex acute. Scapes 1 or 2, from base of pseudobulb, erect, 7-10 mm, terminating in a solitary flower; peduncle filiform, 5-7 mm; floral bracts cupular, ca. 1 mm, apex acute. Pedicel and ovary ca. 4 mm. Flowers yellowish with reddish brown veins; lip orange-red. Dorsal sepal ovate, 5.5-7 × ca. 1.8 mm, apex acute-acuminate; lateral sepals ovate-triangular, 6-7 × ca. 2 mm, apex acute. Petals obovate-oblong, ca. 2.2 × 1 mm, entire, obtuse; lip with a triangular basal part and a linear top part, ending in a somewhat swollen tip, ca. 4 × 1.3 mm, fleshy, proximally concave because of upturned margins, margins then folding downward and angular, adaxial surface glabrous. Column ca. 1 mm; stelidia narrowly fusiform, ca. 1.1 mm, lower margin rounded, without a tooth; foot ca. 1.5 mm, upcurved, with free part ca. 0.7 mm; anther cap subglobose, glabrous. Fl. Jul.

● Tree trunks in forests; ca. 1500 m. S Yunnan.