美柱兰（云南植物研究）
Callostylis rigida Bl., Bijdr. 6: t. 4, fig. 74, et 7: 341. 1825; Lindl., Gen. Sp. Orch. Pl. : 129. 1830; S. C. Chen et Z. H. Tsi in Acta Bot. Yunnan. 6 (3): 269, fig. 2. 1984; Averyanov, Iden. Guide Vietnam. Orch. : 242. 1994; Z. H. Tsi et S. C. Chen in Acta Phytotax. Sin. 33 (3): 290. 1995. ——Tylostylis rigida (Bl.) Bl., Praef. Fl. Jav. : 8. 1828. ——Eria discolor Lindl. in J. Linn. Soc. Bot. 3: 51. 1859; Seidenf. in Opera Bot. 62: 49, fig. 23. 1982, et 114: 175. 1992. ——Tylostylis discolor (Lindl.) Hook. f. in Ann. Bot. Gard. Calcutta 5: 22. 1895, in syn. ; King et Pantl. in Ann. Bot. Gard. Calcutta 8: 130. Pl. 180. 1898. ——Eria pholidotoides Gagnep. in Bull. Mus. Hist. Nat. (Paris) ser. 2, 3: 682. 1931.
Epiphytic on trees in mixed forests; 600-1700 m. S Yunnan [India, Indonesia, Laos, Malaysia, Myanmar, Thailand, Vietnam]. |
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Rhizome creeping, 4-8 mm in diam., with internodes 1-2 cm and cylindric sheaths 1-1.5 cm. Pseudobulbs shiny, ± oblong-fusiform or narrowly fusiform, 6-16 × 2-3 cm, distally 4- or 5-leaved. |
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Leaf blade glossy, suboblong or narrowly elliptic, 12-17 × 2.4-4.3 cm, leathery, base contracted into a short petiole, apex unequally bilobed. |
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Inflorescences often 2-4, racemose, 1.5-4.5 cm, more than 10-flowered; peduncle 2.5-3.5 cm, shortly brown tomentose; floral bracts reflexed, suborbicular or broadly ovate, 3-4 mm, both surfaces shortly tomentose. Flowers greenish yellow, 1.2-1.5 cm in diam.; sepals with grayish brown hairs abaxially and sparsely white pubescent adaxially; lip brown; column foot with a dark purple callus. Dorsal sepal elliptic, 8-10 × 4-5 mm, obtuse; lateral sepals slightly shorter and broader. Petals narrowly elliptic-obovate, 7-8 × 3.5-4 mm; lip ± broadly cordate or broadly ovate, 3.5-4 × 2-3 mm, mucronate, with a cushionlike callus in basal half. Column curved forward at right angle. Capsule narrowly oblong, 3-4 cm × 6-9 mm, with 6 longitudinal ribs, ± hairy. Fl. and fr. May-Jun. |
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