Description from Flora of China
Ophrys unifolia G. Forster, Fl. Ins. Austr. 59. 1786; Microtis formosana Schlechter; M. parviflora R. Brown.
Plants 15-30 cm tall. Tuber small, 4-7 × 3-6 mm. Leaf erect or suberect, 16-33 × 0.2-0.3 cm, adaxially channeled. Inflorescence usually more than 10-flowered, emergent through opening in lower half of leaf; rachis 2.5-5 cm; floral bracts narrowly ovate-lanceolate, 1-2 mm. Flowers green or pale green; ovary and pedicel 2-3.5 mm. Dorsal sepal concave and forming a hood, broadly elliptic, ca. 2 × 1.5 mm, apex obtuse; lateral sepals suboblong or narrowly elliptic, ca. 1.5 × 0.8 mm. Petals narrowly oblong, ca. 1.2 × 0.5 mm, apex obtuse; lip narrowly elliptic-ligulate, 1.5-2 × ca. 1.2 mm, slightly fleshy, with notched callus at base. Column extremely short. Capsule elliptic, ca. 4 × 2-2.5 mm. Fl. and fr. May-Sep. 2n = 44, 88.
Grassy slopes, moist sunny meadows; 100-800 m (to 2000 m in Taiwan). Anhui, Fujian, Guangdong, Guangxi, Hunan, Jiangxi, SE Sichuan, Taiwan, Zhejiang [Indonesia, Japan, Philippines; Australia, Pacific islands (New Zealand)].