Description from Flora of China
Cypripedium ebracteatum Rolfe; C. margaritaceum Franchet var. fargesii (Franchet) Pfitzer.
Plants 8-14 cm tall, with a stout, rather short rhizome. Stem erect, 3.5-7 cm, covered by 2 or 3 nearly tubular sheaths, apex with a subopposite leaf and bract prostrate on substrate. Leaf blade green, marked with blackish brown spots, broadly elliptic to orbicular, 10-15 × 8-14 cm, glabrous, apex obtuse. Inflorescence terminal, with 1 flower, ebracteate; pedicel 2.5-7 cm, glabrous; ovary 1.2-1.5 cm, 3-ribbed; ribs sparsely pubescent. Sepals yellowish green, with dense maroon spots toward base of dorsal sepal; petals yellowish, marked with purplish red stripes and spots; lip yellow, marked with purplish red fine spots; staminode maroon. Dorsal sepal ovate to broadly ovate, 3-4.5 × 2.5-5 cm, puberulent on abaxial veins; synsepal elliptic-ovate, 3-5 × 2.5-3 cm, apex subacute, inconspicuously bidentate. Petals incurved forward, enfolding lip, oblong, 3.5-5.5 × ca. 1.5 cm, densely white villous on upper side of abaxial surface, apex acute; lip deeply pouched, subglobose, slightly dorsiventrally flattened, ca. 2.5 cm, minutely papillose on front surface. Staminode ovate or oblong, ca. 1 cm. Fl. May-Jul.
● Humus-rich soils in thickets, sparse woods, grassy slopes; 1900-3200 m. N Chongqing, S Gansu, W Hubei, W Sichuan.