注：名称已修订，正名是：蜻蜓兰 Platanthera souliei

Platanthera souliei Kraenzlin Repert. Spec. Nov. Regni Veg. 5: 199. 1908.

蜻蜓舌唇兰 qing ting she chun lan

Habenaria pugionifera W. W. Smith; Orchis fuscescens Linnaeus; Perularia fuscescens (Linnaeus) Lindley; P. souliei (Kraenzlin) Schlechter; Platanthera fuscescens (Linnaeus) Kraenzlin; P. pugionifera (W. W. Smith) Schlechter; Tulotis asiatica H. Hara; T. fuscescens (Linnaeus) Rafinesque; T. souliei (Kraenzlin) H. Hara.

Plants 20-60 cm tall. Rootstock slender, stoloniferous. Stem erect, stout, with 1 or 2 tubular sheaths at base, 2(or 3)-leaved. Leaves cauline, obovate to elliptic, 6-15 × 3-7 cm, base clasping, apex obtuse. Peduncle with several lanceolate bracts; rachis elongate, many flowered; floral bracts narrowly lanceolate, exceeding ovary. Flowers yellowish green; pedicel and ovary cylindric-fusiform, ca. 10 mm. Dorsal sepal erect, forming a hood with petals, ovate, concave, ca. 4 × 3 mm, glabrous, 3-veined, apex acute or obtuse; lateral sepals spreading, elliptic, oblique, slightly longer and narrower than dorsal sepal, glabrous, 3-veined, margin slightly reflexed, apex obtuse. Petals elliptic-lanceolate, oblique, 5.5-6.5 × 1.5-1.8 mm, slightly fleshy, 1-veined, apex obtuse; lip pendulous, ligulate-lanceolate, 4-5 × ca. 1.5 mm, with small lateral lobes at base, apex obtuse; basal lobes triangular-falcate, ca. 1 mm, apex acute; spur pendulous, slightly arcuate, cylindric, ca. 10 mm, ca. equal in length to ovary, slender, slightly dilated toward apex. Fl. Jun-Aug, fr. Sep-Oct. 2n = 42.

Forests along gullies; 400-4300 m. Gansu, Hebei, Heilongjiang, Henan, Jilin, Liaoning, Nei Mongol, E Qinghai, Shaanxi, Shandong, Shanxi, Sichuan, NW Yunnan [Japan, Korea, Russia (Siberia)].