Hemipilia silvestrii Pampanini.

Plants 15-35 cm tall. Tubers ellipsoid, 1-2 cm. Stem with 1 tubular cataphyll at base, 1- or rarely 2-leaved. Leaf ovate to ovate-cordate, 5-12 × 4-5.8 cm, base cordate or subcuneate, apex acute. Inflorescence 13-30 cm, with 4 ovate to lanceolate sterile bracts to 2.5 cm; rachis ca. 6 cm, subdensely (2-)7-15-flowered; floral bracts lanceolate, to ca. 11 mm. Flowers purplish red; pedicel and ovary 12-18 mm. Dorsal sepal erect, ovate, cymbiform, 6-6.5 × ca. 3 mm, 3-veined, apex obtuse; lateral sepals obliquely ovate, ca. 7 × 4 mm, 3-veined, apex obtuse. Petals similar to lateral sepals but slightly smaller, oblong-ovate, oblique, ca. 7 × 3.5 mm, 3-veined, margin sometimes irregularly denticulate, apex obtuse to subtruncate; lip simple, suboblong, ca. 13 × 9-10 mm, adaxially finely papillate, base broadly cuneate, margin irregularly crenate, apex truncate, often apiculate or occasionally emarginate; spur straight and horizontal or sometimes slightly curved downward, white, cylindric, uniformly thick (not attenuate), 10-12 mm, apex obtuse and slightly dilated. Column to 4 mm; rostellum oblong-elliptic, ca. 1.5 mm, apex rounded. Fl. Jul.

● Cypress forests, grassy slopes; 1000-1200 m. S Shaanxi, SE Shanxi, N and W Sichuan.