大根槽舌兰（植物分类学报）
Holcoglossum amesianum (Rchb. f.) Christenson in Not. Bot. Gard. Edinb. 44 (2): 255. 1987; Seidenf. in Opera Bot. 95: 308, fig. 201. 1988; Averyanov, Vasc. Pl. Syn. Vietnam. Fl. 1: 110. 1990; Seidenf., l. c. 114: 442. 1992; Averyanov, Iden. Guide Vietnam. Orch.: 344. 1994; Z. H. Tsi, S. C. Chen et K. Mori, Wild Orch. China: 103, pl. 206. 1997; 中国兰花全书: 173. 1998.——Vanda amesiana Rchb. f. in Gard. Chron. 3 ser., 1: 764. 1887; Hook. f. in Bot. Mag. 116: t. 7139. 1890.
Epiphytic on tree trunks in broad-leaved evergreen forests; 1200-2000 m. S and W Yunnan [India, Laos, Myanmar, Thailand, Vietnam]. |
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Plants ascending. Stems 2-5 cm, rooting at base. |
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Leaves 4-7, nearly basal; blade broadly subterete, 9-30 cm × 5-10 mm, fleshy, adaxially channeled or ± conduplicate, acute. |
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Inflorescence ascending, 23-25 cm, several flowered; peduncle to 15 cm, 4-5 mm in diam., with 2-4 short sheaths; floral bracts ovate, 3-4 mm, obtuse. Flowers thinly textured, sepals and petals white with pinkish midvein, lip with 3 deep purple-red ridges above, anther cap white; pedicel and ovary whitish, 3-5 cm. Dorsal sepal elliptic, ca. 15 × 10 mm, base contracted, apex obtuse; lateral sepals obliquely ovate-elliptic, ca. 15 × 11 mm, obtuse. Petals oblanceolate, ca. 14 × 9 mm, base contracted, apex obtuse; lip spurred, 3-lobed; lateral lobes ascending, ovate-triangular, ca. 4 × 5 mm, ± adnate to base of column, obtuse; mid-lobe reniform-orbicular, ca. 10 × 14 mm, base with an erect square appendage at spur entrance, margin denticulate, apex retuse; spur narrowly conic, ca. 6 × 3-4 mm, obtuse and slightly curved backward at tip. Column ca. 6 mm, thick; anther cap narrowed and truncate at apex. Fl. Dec-Mar. |
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