竹枝石斛 转到中国兰科植物志
Dendrobium salaccense 分类来源：中国植物志竹枝石斛（海南植物志）
Dendrobium salaccense (Bl.) Lindl., Gen. Sp. Orch. Pl. : 86. 1830; J. J. Smith, Fl. Buit. 6: 348. 1905; Kraenzl. in Engler, Pflanzenr. 45 (IV. 50. II. B. 21): 169. 1910; S. Y. Hu in Quart. J. Taiwan Mus. 26 (1, 2): 160. 1973; 海南植物志 4: 223. 1977; Z. H. Tsi in Acta Phytotax. Sin. 18 (4): 434. 1980; Seidenf. in Opera Bot. 83: 244, fig. 165. 1985; Averyanov, Vasc. Pl. Syn. Vietnam. Fl. 1: 80. 1990; Seidenf. et J. J. Wood, Orch. Penins. Malay. Singap. : 427. 1992; Averyanov, Iden. Guide Vietnam. Orch. : 179. 1994; Z. H. Tsi et S. C. Chen in Acta Phytotax. Sin. 33 (3): 292. 1995. ——Grastidium salaccense Bl., Bijdr. 7: 333. 1825.
Epiphytic on tree trunks in forests, lithophytic on rocks in open forests; 600-1000 m. Hainan, SE Xizang (Mêdog), S Yunnan (Mengla) [Bhutan, India, Indonesia, Laos, Malaysia, Myanmar, Sri Lanka, Thailand, Vietnam].
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Stem erect, tough, bamboolike, cylindric, to 1 m, 3-4 mm in diam., unbranched, with many nodes, internodes 2-2.5 cm, enclosed in leaf sheaths. |
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Leaves arranged in 2 rows, narrowly lanceolate, ca. 15 × 2 cm, base contracted into a sheath, acuminate toward apex, apex ± hooked on one side; sheaths articulate at junction with blade. |
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Inflorescence emerging through sheaths, apparently leaf-opposed, 1-4-flowered; peduncle very short, base with 2 or 3 bracts; floral bracts pale brown, shell-like, ca. 3 mm. Pedicel and ovary yellowish green, ca. 1.7 cm, slender. Flowers spreading, small; sepals and petals yellowish brown, lip purple, column and anther cap yellow. Dorsal sepal subelliptic, 8-9 × 3.5-4(or more) mm, 9-veined, obtuse to rounded; lateral sepals obliquely ovate-lanceolate, nearly as large as dorsal sepal, base adnate to column foot, apex obtuse to rounded; mentum ca. 6 mm. Petals suboblong, ca. as long as dorsal sepal, but slightly narrower, 3-veined, marginal veins branched, apex obtuse to rounded; lip obovate-elliptic, ca. 12 × 5 mm, adaxial surface with 1 central yellow ridge, with a long tapelike callus near apex, rounded, mucronate. Column ca. 4 mm; anther cap conic.
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