4. Aerides flabellata Rolfe ex Downie, Bull. Misc. Inform. Kew. 1925: 387. 1925.
扇唇指甲兰 shan chun zhi jia lan
Vanda flabellata (Rolfe ex Downie) Christenson.
Stems 10-30 cm, stout. Leaf blade narrowly oblong or lorate, ca. 16 × 1.5-2 cm, thickly leathery, conduplicate toward base, apex unequally bilobed or ± praemorse. Inflorescences axillary, 1-2, racemose, 5-25 cm, sparsely few flowered; floral bracts broadly ovate, ca. 4 mm, obtuse. Flowers thickly textured, sepals and petals yellowish brown, spotted with reddish brown, lip white, spotted with pale purple, mid-lobe with a central purple stripe and yellow ridges, spur yellow with blackish tip, anther cap deep yellow and purplish spotted; pedicel and ovary ca. 2 cm. Dorsal sepal broadly ovate, ca. 10 × 8 mm, obtuse; lateral sepals oblique, broadly ovate, ca. 10 × 12 mm, base adnate to column foot, apex obtuse. Petals obliquely ovate, slightly smaller than dorsal sepal; lip movable, spurred, 3-lobed; lateral lobes erect, ovate-triangular, ca. 5 mm, adnate to apical part of column foot; mid-lobe flabellate, ca. 10 × 7 mm, channeled above, densely minutely papillate, and on both sides with 2 ridges; claw ca. 1.5 cm, margin erose; spur bent forward and pointing to mid-lobe, cylindric, ca. 1 cm × 2-3 mm. Column ca. 3 mm, foot ca. 3 mm; anther cap truncate-rounded at apex. Fl. May. 2n = 38.
Epiphytic on tree trunks in sparse evergreen broad-leaved forests or at forest margins; 600-1700 m. S and SE Yunnan [Laos, Myanmar, Thailand].