笋兰 （中国高等植物图鉴）
Thunia alba (Lindl.) Rchb. f. in Bot. Zeit. 10: 764. 1852; 中国高等植物图5: 694. 图8218. 1976; Seidenf. in Opera Bot. 89: 14. fig. 2. 1986. et 114: 77. 1992;横断山区维管植物2: 2580. 1994; Z. H. Tsi et S. C. Chen in Acta Phytotax. Sin. 33 (3): 296. 1995. ——Phaius albus Lindl. in Wall. Pl. As. Rar. 2: t. 198. 1831. ——Thunia marshalliana Rchb. f. in Linnaea 41: 65. 1877. ——Phaius marshalliana (Rchb. f.) N. E. Br. in Kew Bull. 101. 1889.——Thunia venosa Rolfe in Orch. Rev. 13: 206. 1905, et in Not. Bot. Gard. Edinb. 8: 22. 1913.
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Lithophytic on rocks or epiphytic on lower branches of trees in forests or in shaded and rocky places; 1200-2300 m. SW Sichuan, SE Xizang, S, SE, and W Yunnan [Bhutan, NE India, Indonesia, Malaysia, Myanmar, Nepal, Thailand, Vietnam].
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Plants, terrestrial or epiphytic. Stem erect, terete, 30-100 cm tall, somewhat stout, usually with ca. 10 leaves, base with several amplexicaul sheaths, completely enclosed in leaf sheaths. |
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Leaf blade narrowly elliptic or narrowly elliptic-lanceolate, 10-20 × 2.5-5 cm, papery or herbaceous, apex acuminate or long acuminate, with amplexicaul sheaths at base, articulate; sheaths persistent, tubular, 2-4 cm, becoming scarious. Rachis 4-10 cm, 2-7-flowered; floral bracts persistent, broadly elliptic to elliptic, cymbiform, large, 3-5 cm, papery. |
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Flowers large, white, lip yellow [or white] and with orange or chestnut spots and stripes; pedicel and ovary 2.5-3 cm. Sepals narrowly oblong, 4-5 × ca. 1.5 cm, apex acuminate. Petals similar to sepals in size, slightly narrower; lip broadly ovate-oblong or broadly oblong-pandurate, 4-5 × 2.5-3 cm, irregularly fimbriate or erose, simple, apical margin crisped; disk with 5-9 shortly dentate-fimbriate ridges; spur cylindric, ca. 1 cm × 3-3.5 mm, apex obtuse. Column ca. 2 cm.
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Capsule ellipsoid, ca. 4 × 2 cm. Fl. Jun. 2n = 36, 38, 40, 42, 44, 80. | ||
