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

10. Cleisostoma striatum (H. G. Reichenbach) N. E. Brown, Suppl. Johnson’s Gard. Dict. 901. 1882.

短序隔距兰 duan xu ge ju lan

Echioglossum striatum H. G. Reichenbach, Gard. Chron., n.s., 12: 390. 1879; Cleisostoma brevipes J. D. Hooker; Raciborskanthos striatus (H. G. Reichenbach) Szlachetko; Sarcanthus brevipes (J. D. Hooker) J. J. Smith; S. striatus (H. G. Reichenbach) J. J. Smith.

Stems cylindric, to 30 cm, ca. 7 mm in diam., internodes ca. 2 cm, many leaved. Leaves flat, narrowly oblong-lanceolate, usually 7-11 × ca. 1.5 cm, fleshy, acute. Inflorescence arising from middle or above on stem, pendulous, axillary, 2-6 cm, unbranched, densely many flowered; peduncle with several, fleshy, scalelike sheaths; floral bracts broadly ovate, 2-3 mm, fleshy. Flowers opening widely, fleshy; sepals and petals orange-yellow with purple stripes, lip yellowish, mid-lobe purple; pedicel and ovary longer than floral bracts. Dorsal sepal suboblong, cymbiform, ca. 6 × 3 mm, obtuse; lateral sepals slightly oblique, ovate, ca. as large as dorsal sepal. Petals suboblong, ca. 5 × 2.5 mm, obtuse; lip lateral lobes falcate-triangular, acute; mid-lobe sagittate-triangular, fleshy, narrowed and deeply divided into 2 tails, with 2 backward triangular basal lobules, adaxially with a longitudinal fleshy lamella; spur perpendicular to ovary, short, interior longitudinally septate, with a back wall callus; callus entire, laterally compressed, basal half triangular and papillate. Column ca. 3 mm; rostellum ligulate, fleshy, extending beyond column wing; anther cap elongate, broadly emarginate; stipe oblanceolate, geniculate-folded at base, margin revolute; viscidium crescent-shaped, large. Fl. Jun. 2n = 38.

Epiphytic on tree trunks in broad-leaved evergreen forests; 500-1600 m. SW Guangxi, Hainan, SE to W Yunnan [NE India, Malaysia (Peninsular), Thailand, Vietnam].


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