红花隔距兰（中国高等植物图鉴）
Cleisostoma williamsonii (Rchb. f.) Garay in Bot. Mus. Leafl. Harvard Univ. 23 (4): 176. 1972; Seidenf. in Dansk Bot. 29 (3): 50, fig. 21, 22. 1975; Z. H. Tsi in Bull. Bot. Res. 3 (4): 80. 1983; Seidenf. in Opera Bot. 114: 395. 1992; Seldenf. et. J. J. Wood. Orch, Penins. Malay. Singap.: 823. 1992; Averyanov, Iden. Guide Vietnam. Orch.: 383. 1994; Z. H. Tsi et S. C. Chen in Acta Phytotax. Sin. 33 (3): 290. 1995. ——Sarcanthus williamsonii Rchb. f. in Gard. Chron.: 674. 1865. ——S. hongkongensis Rolfe in Kew Bull.: 198. 1898; Schltr. in Fedde Repert. Sp. Nov. Beih. 4: 293. 1919; Merr. et Metc. in Lingn. Sci. J. 21: 13. 1945; S. Y. Hu in Quart. J. Taiwan Mus. 28 (1, 2): 155. 1975; 中国高等植物图鉴5: 761. 图8351. 1976; 海南植物志 4: 261. 1977. ——S. elongatus Rolfe, l. c. 36: 36. 1903. ——Sarcanthus flagellaris Schltr., l. c. 4: 76, 292. 1919; S. Y. Hu, l. c. 28 (1, 2): 153. 1975. ——Cleisostoma elongatum (Rolfe) Garay, l. c. 23 (4): 171. 1972. ——C. hongkongense (Rolfe) Garay, l. c. 23 (4): 172. 1972.
Epiphytic on tree trunks in forests, lithophytic on rocks along wooded valleys; 300-2200 m. Guangdong, Guangxi, SW Guizhou, Hainan, SE to W Yunnan [Bhutan, NE India, Indonesia, Malaysia, Myanmar, Thailand, Vietnam].
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Plants often pendulous. Stems to 70 cm, rather slender, 3-4 mm in diam., branched or unbranched, many leaved, internodes 1-2.5 cm. |
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Leaves straight or slightly arching, terete, usually 6-10 cm × 2-3 mm, obtuse. |
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Inflorescence lateral, ascending, longer than leaves, usually branched, densely many flowered; floral bracts ovate-lanceolate, ca. 2 mm. Flowers opening widely, pink, lip deep purple-red; pedicel and ovary ca. 5 mm, slender. Dorsal sepal ovate-elliptic, cymbiform, ca. 2.2 × 1.5 mm, rounded; lateral sepals obliquely ovate-elliptic, ca. 2.5 × 1.5 mm, base adnate to column foot, obtuse. Petals oblong, ca. 2.2 × 1 mm, obtuse; lip lateral lobes erect, ligulate-oblong, obtuse, ± incurved; mid-lobe narrowly ovate-triangular, fleshy, adaxially with a ridge raised and triangular near spur entrance; spur globose, ca. 2 mm in diam., slightly laterally compressed, concave, interior inconspicuously septate, with a back wall callus; callus 3-lobed, T-shaped; lateral lobules nearly horn-shaped, slightly recurved; mid-lobule shallowly bilobed at base and densely papillate-hairy. Column ca. 2 mm; anther cap truncate, broadly emarginate; stipe broadly ovate-triangular or miter-shaped; viscidium nearly crescent-shaped. Fl. Apr-Jun. |
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