华西蝴蝶兰 hua xi hu die lan

Doritis wilsonii (Rolfe) T. Yukawa & K. Kita; Kingidium wilsonii (Rolfe) O. Gruss & Roellke; Phalaenopsis minor F. Y. Liu; Polychilos wilsonii (Rolfe) Shim.

Roots well developed, ± greenish, elongate, slightly flattened, densely verrucose. Stems ca. 1 cm, usually 4- or 5-leaved, leafless or with 1 or 2 small leaves at anthesis. Leaves often deciduous in dry season, sometimes purplish reddish abaxially when young, oblong or subelliptic, 6.5-8 × 2.6-3 cm. Inflorescences often 1 or 2, suberect or arching, 4-8.5 cm, unbranched, laxly 10-15-flowered; floral bracts ovate-triangular, 4-5 mm, membranous. Flowers opening simultaneously, opening widely; sepals and petals pastel pink grading to medium rose at base, lip dark rose-purple, column white; pedicel and ovary 3-3.8 cm. Sepals oblong-elliptic, 15-20 × 6-7 mm, obtuse. Petals spatulate or elliptic-obovate, 14-15 × 6-10 mm, rounded; lip base with a claw 2-3 mm, lip 3-lobed; lateral lobes erect, ca. 6 mm, adaxially with an incised-tipped keel; mid-lobe broadly obovate, 8-13 × 6-9 mm, fleshy, notched at apex, convex, with a raised elliptic pad below apex, with a raised median keel at base; callus biseriate, subsimilar and subequal, sulcate, bilobed. Column ca. 6 mm, foot ca. 3 mm. Capsule cylindric, to 7 cm × ca. 6 mm. Fl. Apr-Jul, fr. Aug-Sep.

Epiphytic on tree trunks or lithophytic on damp rocks in forests or along valleys; 800-2200 m. W Guangxi, SW Guizhou, SW Sichuan, SE Xizang, NW to SE Yunnan [N Vietnam].