大花斑叶兰 da hua ban ye lan

Georchis biflora Lindley, Gen. Sp. Orchid. Pl. 496. 1840; Epipactis biflora (Lindley) A. A. Eaton; E. macrantha (Maximowicz ex Regel) A. A. Eaton; E. pauciflora (Schlechter) Hu; Goodyera biflora var. macrantha (Maximowicz ex Regel) T. Hashimoto; G. macrantha Maximowicz ex Regel; G. pauciflora Schlechter; Peramium macranthum (Maximowicz ex Regel) Makino.

Plants terrestrial, 5-15 cm tall. Rhizome slender, few noded. Stem ascending, 3-12 cm, 4- or 5-leaved. Leaves widely spaced or clustered at apex of stem, abaxially pale green to pale purplish red, adaxially green with white reticulate venation, ovate to elliptic, 2-4 × 1-2.5 cm, base rounded, apex acute; petiole-like base and tubular sheath 1-2.5 cm. Peduncle reddish brown, ca. 1 cm, pubescent, usually enclosed within leaf bases, with 1 or 2 sterile bracts; rachis ca. 0.5 cm, usually 2-flowered, rarely 3-flowered, secund; floral bracts lanceolate, 15-25 × 6-7 mm, pubescent, apex acuminate. Flowers opening weakly, tubular, large; pedicel and ovary cylindric-fusiform, 5-8 mm, pubescent. Sepals reddish pink, similar, pubescent on outer surface, 1-veined; dorsal sepal linear-lanceolate, 20-25 × 3-4 mm, apex acute; lateral sepals linear-lanceolate, 20-25 × 3-4 mm, apex obtuse. Petals creamy white, linear-oblanceolate, slightly oblique, 20-25 × ca. 3 mm, apex acute; lip creamy white, linear-lanceolate, 18-22 × 3-4 mm; hypochile concave-saccate, inside papillose; epichile ligulate, 10-15 mm, apex acute to acuminate, recurved. Column ca. 3 mm; anther narrowly triangular-lanceolate, 10-12 mm; pollinia oblanceolate, 12-16 mm; rostellum 10-12 mm, slender, remnant deeply bifid. Fl. Feb-Jul. 2n = 28, 29, 30, 31, 32 + 0-4B, 33.

Damp places in forests; 500-2200 m. Anhui, N Fujian, S Gansu, Guangdong, Guizhou, S Henan, Hubei, Hunan, Jiangsu, S Shaanxi, Sichuan, Taiwan, Xizang, Yunnan, Zhejiang [India, Japan, Korea, Nepal, N Vietnam].