4. Habenaria acianthoides Schlechter, Acta Horti Gothob. 1: 138. 1924.
小花玉凤花 xiao hua yu feng hua
Plants 18-20 cm tall. Tubers ovoid, ca. 1.5 cm, fleshy. Stem erect or ascending, slender, glabrous, with 1 leaf at base and 2 or 3 bractlike leaves above. Leaf blade green or purplish red, ovate-orbicular, 1.5-3 × 2.2-2.8 cm, slightly fleshy, base subcordate, apex mucronate. Raceme with 10-20 secund flowers, 8-12 cm; floral bracts ovate-lanceolate, much shorter than ovary, apex acuminate; ovary twisted, fusiform, including pedicel ca. 4.5 mm, glabrous. Flowers green, very small. Dorsal sepal forming a hood with petals, erect, ovate, ca. 1.5 × 1.2 mm, 1-veined, apex obtuse; lateral sepals reflexed, obliquely ovate, ca. 1.75 × 1 mm, 1-veined, apex obtuse. Petals obliquely ovate, ca. 1.5 × 1.5 mm, 1-veined; lip spurred at base, 3-veined, deeply 3-lobed below middle; lateral lobes divaricate, ± curved, filiform, ca. 3.5 mm; mid-lobe straight, linear, ca. 2 mm; spur pendulous, oblong-cylindric, ca. 1.5 mm, apex obtuse. Fl. Jul.
● Forests, thickets; 900-1900 m. S Gansu, E Qinghai, W Sichuan.