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FOC | Family List | FOC Vol. 25 | Orchidaceae | Cleisostoma

2. Cleisostoma medogense Z. H. Tsi, Acta Phytotax. Sin. 23: 387. 1985.

西藏隔距兰 xi zang ge ju lan

Stems erect, ca. 2 cm, ca. 5 mm in diam. Leaves twisted, flat, narrowly oblong, ca. 15 × 1.3-1.5 cm, acutely bilobed. Inflorescences 1 or 2, arising from base of stem, shorter than or nearly as long as leaves, branched or unbranched, many flowered; peduncle with 2 or 3 tubular sheaths; floral bracts ovate-triangular, ca. 1 mm, acute. Flowers yellow; pedicel and ovary ca. 4 mm. Sepals similar, ovate-elliptic, concave, ca. 3.2 × 2.5 mm, obtuse. Petals slightly falcate-oblong, narrower than sepals, obtuse; lip lateral lobes erect, subquadrate, apical margin irregularly incised; mid-lobe subtriangular, obtuse; spur straight, narrowly conic, ca. 3 mm, rounded, interior with a subtriangular, glabrous callus on back wall, without a distinct septum; anther cap long beaked at apex; stipe ± clavate, margin inflexed; viscidium suborbicular, small. Fl. May.

● Epiphytic on tree trunks in broad-leaved evergreen forests; 800-900 m. SE Xizang.


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