8. Cleisostoma menghaiense Z. H. Tsi, Bull. Bot. Res., Harbin. 3(4): 76. 1983.
勐海隔距兰 meng hai ge ju lan
Stems erect, 2-3 cm, unbranched. Leaves 5 or 6, distichous, subbasal, flat, linear or narrowly oblong, basal half V-shaped-conduplicate, 8-14 × 0.4-0.8 cm, fleshy, acute. Inflorescence arising from near base of stem, pendulous, longer than leaves, branched or unbranched, laxly many flowered; floral bracts ovate-triangular, ca. 1 mm, acute. Flowers opening widely, pale yellow, thickly textured, lateral lobes of lip lilac; pedicel and ovary ca. 5 mm. Dorsal sepal elliptic, cymbiform, ca. 3.5 × 2 mm, subrounded; lateral sepals slightly oblique, obovate, ca. as large as dorsal sepal, obtuse. Petals obliquely suboblong, ca. 3 × 1.5 mm, obtuse; lip lateral lobes erect, deltoid; mid-lobe deltoid, ca. 2.5 mm, slightly fleshy, acute; spur somewhat horn-shaped, ca. 4 mm, apex obtuse, interior longitudinally septate, with a back wall callus; callus 3-lobed, laterally compressed, base shallowly bilobed and slightly papillate-hairy; mid-lobule oblong and concave in center. Column ca. 2 mm; rostellum small; anther cap ca. 2 mm; stipe slightly clavate, short, narrow; viscidium suborbicular. Fl. Jul-Oct.
● Epiphytic on tree trunks at forest margins; 700-1200 m. S and SE Yunnan.