叉唇石斛（中国高等植物图鉴）
长柔毛石斛（云南种子植物名录）
Dendrobium stuposum Lindl. in Bot. Reg. 24 (Misc.): 52. 1838, et 30: 52. 1844; Hook. f., Fl. Brit. Ind. 5: 737. 1890, et in Ann. Bot. Gard. Calcutta 5: 13, pl. 20. 1895; King et Pantl. in Ann. Bot. Gard. Calcutta 8: 54, pl. 75. 1898; Kraenzl. in Engler, Pflanzenr. 45 (IV. 50, II. B. 21): 56. 1910; W. W. Smith in Not. Bot. Gard. Edinb. 13: 201. 1921; S. Y. Hu in Quart. J. Taiwan Mus. 26 (1, 2): 161. 1973; 中国高等植物图鉴 5: 983. 1976; Z. H. Tsi in Acta Phytotax. Sin. 18 (4): 442. 1980; Seidenf. in Opera Bot. 83: 93, fig. 54. 1985; Z. H. Tsi et S. C. Chen in Acta Phytotax. Sin. 33 (3): 292. 1995; Z. H. Tsi, S. C. Chen et K. Mori, Wild Orch. China: 86. pl. 106. 1997.
Epiphytic on tree trunks in open and mountain forests; ca. 1800 m. S Yunnan [Bhutan, NE India, Indonesia, Malaysia, Myanmar, Philippines, Thailand]. |
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Stems cylindric, 5-30 cm, 3-6 mm in diam., lower part narrowed, with 5-17 nodes, internodes 1.5-2.5 cm, with many longitudinal ridges. |
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Leaves narrowly oblong-lanceolate, 4-7.5 × 0.4-1.5(or more) cm, leathery, base with clasping sheath, apex slightly obtuse and hooked on one side. |
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Inflorescence apical on old leafless stem, 1-2.5 cm, 2- or 3-flowered; peduncle 10-15 mm, ca. 1 mm in diam.; rachis thin and soft; basal sheaths 3 or 4, broadly cupular; floral bracts oblong, 5-9 × 2.5-3(or more) mm, papery, obtuse. Pedicel and ovary 0.6-1.1 cm, slender. Flowers small, white. Dorsal sepal oblong, ca. 8 × 3 mm, 5-veined, midvein prominent, apex subacute; lateral sepals obliquely ovate-lanceolate, larger than dorsal sepal, 5-veined, midvein abaxially winged especially below middle, apex subacute; mentum conic, ca. 4 mm. Petals obovate-elliptic, ca. 8 × 3 mm, 5-veined, margin near apex sometimes laxly shortly ciliate, apex obtuse; lip obovate-triangular, ca. 9 mm, base cuneate, apex 3-lobe; lateral lobes ovate-triangular, margin with dense, matted, long white cottony hairs, apex sharply toothed; mid-lobe ovate-triangular, margin similarly hairy, obtuse; disk densely villous, with a broadly keeled rib extending from base to apex, apex thickened. Column short; column teeth triangular, acute. |
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