东亚舌唇兰 dong ya she chun lan

Platanthera tipuloides Lindley var. ussuriensis Regel, Tent. Fl. Ussur. 157. 1861; Habenaria shensiana Kraenzlin; H. ussuriensis (Regel) Miyabe; Perularia shensiana (Kraenzlin) Schlechter; P. ussuriensis (Regel) Schlechter; Platanthera herbiola Lindley var. japonica Finet; P. shensiana (Kraenzlin) Tang & F. T. Wang; Tulotis shensiana (Kraenzlin) H. Hara; T. ussuriensis (Regel) H. Hara.

Plants 20-55 cm tall. Rootstock creeping, 2-4 cm, slender, stoloniferous. Stem erect, slender, with 1 or 2 tubular sheaths at base, 2- or 3-leaved. Leaves cauline, widely spaced, spatulate to narrowly oblong, 6-14 × 1.2-2.5(-3) cm, base clasping, apex obtuse or acute. Peduncle slender, with 1 to several small, lanceolate bracts; rachis 6-10 cm, laxly 10-20-flowered; floral bracts narrowly lanceolate, 8-11 mm, apex acuminate. Flowers pale yellowish green; pedicel and ovary cylindric, 8-9 mm. Dorsal sepal erect, forming a hood with petals, broadly ovate, concave, 2.5-3 × 2-2.5 mm, glabrous, 3-veined, apex obtuse; lateral sepals spreading or reflexed, narrowly elliptic, slightly oblique, ca. 3 × 1 mm, glabrous, 3-veined, apex obtuse. Petals narrowly oblong-lanceolate, 2.5-3 × ca. 1 mm, slightly fleshy, 1-veined, apex obtuse or subtruncate; lip pendulous, slightly deflexed, narrowly ligulate-lanceolate, ca. 4 × 1 mm, with small lateral lobes at base, apex obtuse; basal lobes suborbicular, apex rounded; mid-lobe ligulate-lanceolate or ligulate, apex obtuse; spur pendulous, slightly incurved, cylindric, 4-5 mm, shorter than ovary, slender, apex acute. Fl. Jul-Aug, fr. Sep-Oct. 2n = 42.

Forests, forest margins, shaded places along gullies; 400-2800 m. Anhui, N Fujian, NE Guangxi (Ziyuan), Hebei, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Jilin, Shaanxi, Sichuan, Zhejiang [Japan, Korea, Russia (Far East)].