Description from Flora of China
Satyrium microcephalum Kraenzlin; S. nepalense D. Don subsp. yunnanense (Rolfe) Soó; S. pycnostachyum Schlechter.
Plants 11-35 cm tall. Tubers ellipsoid to subovoid, 1-2.5 × 0.5-1.4 cm. Stem with 1 or 2 membranous sheaths at base, 1- or 2-leaved. Leaves basal and subopposite, or cauline, somewhat spaced and alternate, broadly ovate to subelliptic, 3.5-11 × 2-5 cm, margin sometimes crisped, apex obtuse to acute. Peduncle 5-25 cm, stout, with 1 or 2 foliaceous sheathing bracts, glabrous; rachis 2-4.5 cm, subdensely to densely 10- to more than 20-flowered; floral bracts reflexed, ovate, 8-15 × 5-7 mm. Flowers usually widely spreading, yellow to golden yellow, glabrous, hermaphroditic; pedicel and ovary 5-7 mm, glabrous. Dorsal sepal oblong, 4-6 × 1.5-2 mm, apex obtuse; lateral sepals oblong, slightly oblique, ca. 5 × 2 mm, apex obtuse to acute. Petals suboblong-spatulate, ca. 3.5 × 1.2 mm, apex obtuse; lip subglobose, 4-5.5 × 3.5-5 mm, outer surface somewhat carinate, inner surface pubescent at base, 2-spurred, apex obtuse to slightly apiculate; spurs parallel, straight or slightly curved downward, cylindric, 3.5-6 mm, slender. Column erect, 2-3.5 mm. Fl. Jul-Sep, fr. Nov.
● Open forests, rocky places; 2000-3700 m. SW Sichuan, C and NW Yunnan.