尖喙隔距兰（中国高等植物图鉴）
Cleisostoma rostratum (Lodd.) Seidenf. ex Averyanov, Vasc. Pl. Syn. Vietnam. Fl. 1: 53. 1990, et Iden. Guide Vietnam. Orch.: 376. 1994. ——Vanda rostrata Lodd., Bot. Cab. t. 1008. 1825. ——Sarcanthus rostratus Lindl., Coll. Bot. t. 39B. 1826, et Gen. Sp. Orch. Pl.: 233. 1833; Rolfe in J. Linn. Soc. Bot. 36: 37. 1903; Merr. et Metc. in Lingn. Sci. J. 21: 13. 1945; S. Y. Hu in Quart. J. Taiwan Mus. 28 (1, 2): 155. 1975. ——Cleisostoma fordii Hance in J. Bot. Brit. For. 14: 45. 1875; S. Y. Hu, Gen. Orch. Hong Kong: 115. 1977. ——Sarcanthus fordii (Hance) Rolfe in J. Linn. Soc. Bot. 36: 37. 1903. ——Cleisostoma rostratum (Lindl.) Garay in Bot. Mus. Leafl. Harvard Univ. 23 (4): 174. 1972; Seldenf. in Dansk Bot. Ark. 29 (3): 28, fig. 10. 1975; 中国高等植物图鉴 5: 763. 图8356. 1976; 海南植物志 4: 262. 1977; Z. H. Tsi in Bull. Bot. Res. 3 (4): 75. 1983; Seidenf. in Opera Bot. 114: 290. 1992; Z. H. Tsi et S. C. Chen in Acta Phytotax. Sin. 33 (3): 290. 1995.
Epiphytic on tree trunks in broad-leaved evergreen forests or on branches in thickets, lithophytic on rocks in limestone areas; 300-1800 m. Guangxi, S Guizhou, Hainan, Hong Kong, S and SE Yunnan [Cambodia, Laos, Thailand, Vietnam].
This species is similar to Cleisostoma striatum ( Rchb.f. ) Garay in its leaf morphology, especially slightly constricted near the leaf apex, but the leaf texture is thinner, the inflorescence axis is slender, and the shape of the lobes of the labial petals and the callosal in the talus are different. |
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Stems subterete, 20-45 cm, ca. 5 mm in diam., sometimes branched, with many nodes, internodes 2-3 cm. |
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Leaves distichous, flat, narrowly lanceolate, 9-15 × 7-13 mm, leathery, acute. |
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Inflorescences several, opposite to leaves, arising from upper part of stem, ascending, shorter than leaves, unbranched, laxly many flowered; floral bracts ovate-triangular, ca. 1 mm. Flowers opening widely, sepals and petals yellowish green with purplish red stripes, lip purple-red; pedicel and ovary ca. 5 mm. Dorsal sepal subelliptic, cymbiform, 5-5.5 × 2-2.5 mm, acute; lateral sepals slightly obliquely obovate, 5-5.5 × 2.5-3 mm, obtuse. Petals suboblong, ca. 4 × 2 mm, obtuse; lip lateral lobes erect, subtriangular, apex abruptly contracted and subulate; mid-lobe narrowly ovate-lanceolate, slightly fleshy, acuminate; spur somewhat funnel-shaped, straight, ca. 5 mm, attenuate toward end, obtuse, slightly septate; back wall callus oblong, central part longitudinally concave, base shallowly bilobed and glabrous. Column ca. 2 mm; rostellum ca. 1.3 mm; anther cap beak ca. 1.5 mm; stipe slender, apical part slightly enlarged; viscidium suborbicular, very small. Fl. Jul-Aug. 2n = 38. |
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