大根槽舌兰 da gen cao she lan

Vanda amesiana H. G. Reichenbach, Gard. Chron., ser. 3, 1: 764. 1887.

Plants ascending. Stems 2-5 cm, rooting at base. Leaves 4-7, nearly basal; blade broadly subterete, 9-30 cm × 5-10 mm, fleshy, adaxially channeled or ± conduplicate, acute. 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. 2n = 38.

Epiphytic on tree trunks in broad-leaved evergreen forests; 1200-2000 m. S and W Yunnan [India, Laos, Myanmar, Thailand, Vietnam].