15. Cleisostoma simondii (Gagnepain) Seidenfaden, Dansk Bot. Ark. 29(3): 66. 1975.
毛柱隔距兰 mao zhu ge ju lan
Plants often ascending. Stems to 50 cm, rather slender, ca. 4 mm in diam., usually branched, many leaved, internodes 1-2.5 cm. Leaves terete, 7-11 cm × ca. 3 mm, slender, fleshy, obtuse. Inflorescence lateral, ascending, longer than leaves, unbranched or sometimes shortly branched, many flowered; floral bracts ovate, ca. 2 mm, membranous. Flowers yellowish green with purplish red veins, subfleshy; lip mid-lobe purple-red or yellowish white; pedicel and ovary 7-10 mm. Sepals oblong, 6-7 × 3-4 mm, rounded; lateral sepals slightly oblique, basally with 1/2 width adnate to column foot. Petals similar to sepals and smaller, obtuse; lip lateral lobes erect, deltoid; mid-lobe ovate-triangular, thickly fleshy, apex acute, base with a central triangular projection; spur subglobose, laterally compressed, ca. 4 mm in diam., apex concave, interior distinctly septate, with a back wall callus; callus either 3-lobed and T-shaped or subquadrate; mid-lobe subcuneate, centrally slightly concave, base shallowly bilobed and densely papillate-hairy. Column ca. 3 mm, densely white hairy at base in front; rostellum broadly triangular; anther cap slightly elongate and subtruncate at apex; stipe nearly suborbicular, base folded; viscidium saddlelike, large. Fl. Sep.
Epiphytic on tree trunks or lithophytic on rocks in forests or in open forests along rivers; 500-1200 m. Fujian, S Guangdong, Hainan, S Yunnan [NE India, Laos, Thailand, Vietnam].