贵州石仙桃 gui zhou shi xian tao

Rhizome 2-4 mm in diam., ± covered with scaly membranous sheaths. Pseudobulbs cylindric, 5-7 cm × ca. 4 mm, narrowed toward apex, apex 1-leaved. Leaf blade narrowly elliptic-lanceolate or narrowly oblong-lanceolate, 10-12 × 1.6-1.8 cm, papery, apex acuminate; petiole 2-2.5 cm. Inflorescence arising from young pseudobulbs with an immature leaf enclosed by sheaths, 10-15 cm; rachis 7-10 cm, laxly many flowered; floral bracts persistent, elliptic, concave, 3-4 mm. Flowers pale rose; pedicel and ovary 5-6(-15) mm. Dorsal sepal elliptic, concave, 8-10 × 3.5-4.5 mm, dorsally slightly carinate, apex mucronate; lateral sepals ovate, slightly oblique, nearly as large as dorsal sepal, dorsally carinate. Petals obliquely elliptic, slightly smaller than dorsal sepal; lip 9-11 mm, shallowly cupular near middle, base broadly cuneate; apical part broadly ovate, 5-6 mm, 3-lobed; lateral lobes nearly orbicular, 1-1.5 mm; mid-lobe subquadrate, apex emarginate and mucronate, adaxially with 3 longitudinal lamellae; lamellae somewhat crested, median short, lateral longer, extending downward into thickened veins. Column ca. 5 mm, upper part with broad wings; rostellum broadly ligulate. Fl. Mar.

Lithophytic on rocks in thickets; 800-1200 m. S Guizhou [N Vietnam].