尖刀唇石斛  转到中国兰科植物志

Dendrobium heterocarpum  分类来源:中国植物志

尖刀唇石斛(植物分类学报) 

Dendrobium heterocarpum Lindl., Gen. Sp. Orch. Pl.: 78. 1830; Hook. in Bot. Mag. 79: t. 4708. 1853; Hook. f., Fl. Brit. Ind. 5: 737. 1890; King et Pantl. in Ann. Bot. Gard. Calcutta 8: 53, pl. 77. 1898; Kraenzl. in Engler, Pflanzenr. 45 (IV. 50, II. B. 21): 45. 1910; Schltr. in Fedde Repert. Sp. Nov. 10: 37. 1911; Ames in Enum. Pnilip. Fl. Pl. 1, 3: 349. 1924; H. Hara et al., Enum. Flow. Pl. Nepal 1: 39. 1978; Z. H. Tsi in Acta Phytotax. Sin. 18 (4): 440. 1980; Seidenf. in Opera Bot. 83: 50, fig. 26. 1985; Averyanov, Vasc. Pl. Syn. Vietnam. Fl. 1: 74. 1990; Seidenf., l. c. 114: 229. 1992; Averyanov, Iden. Guide Vietnam. Orch.: 189. 1994; Z. H. Tsi et S. C. Chen, l. c. 33 (3): 291. 1995; Z.H. Tsi, S. C. Chen et K. Mori, Wild Orch. China: 78, pl. 92. 1997; 中国兰花全书: 166. 图6-14 (2). 1998.

Epiphytic on tree trunks in open forests; 1500-1800 m. S and W Yunnan [Bhutan, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, Philippines, Sri Lanka, Thailand, Vietnam].

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Stems often ascending, ± clavate, 5-27 cm, 1-1.5 cm in diam., thickly fleshy, base contracted, thickened toward apex, unbranched, with several ± swollen nodes, internodes 2-3 cm, golden yellow when fresh, sulfur-yellow tinged with dirty black when dry. 

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 Leaves oblong-lanceolate, usually 7-10 × 1.2-2 cm, leathery, base with clasping sheath, apex acute or slightly obtuse; leaf sheath papery.

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Inflorescence a raceme arising from apical part of deciduous old stem, 1-4-flowered; peduncle 2-3 mm; basal sheaths 2 or 3, membranous; floral bracts pale white, broadly ovate, 4-9 mm, membranous, apex obtuse. Pedicel and ovary ca. 2 cm. Flowers scented, spreading; sepals and petals silver-white or creamy yellow, lateral lobes of lip yellow with red striation, mid-lobe silver or creamy yellow, column white, purplish red on sides, yellow on inner surface, foot yellow. Dorsal sepal oblong, 27-30 × ca. 8 mm, 5-veined, apex obtuse; lateral sepals obliquely ovate-lanceolate, ca. as large as dorsal sepal, main veins 7, secondary veins many, base slightly oblique, apex subacute; mentum conic, ca. 7 mm. Petals ovate-oblong, 25-28 × 9-10(or more) mm, main veins 5, secondary veins many, margin entire, apex acute; lip ovate-lanceolate, nearly as long as sepals, inconspicuously 3-lobed; lateral lobes erect, middle part downcurved, adaxially with dense, short, reddish brown hairs, margin entire; mid-lobe acute. Column ca. 3 mm, front (adaxial surface) base slightly dilated; anther cap conic, ca. 2.5 mm, densely finely papillate, front margin denticulate.




Flowering : March-April.

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Fruit :

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