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FOC | Family List | FOC Vol. 25 | Orchidaceae | Platanthera

30. Platanthera japonica (Thunberg) Lindley, Gen. Sp. Orchid. Pl. 290. 1835.

舌唇兰 she chun lan

Orchis japonica Thunberg in Murray, Syst. Veg., ed. 14, 811. 1784; Habenaria japonica (Thunberg) A. Gray; H. omeiensis Rolfe; Platanthera manubriata Kraenzlin; P. omeiensis (Rolfe) Schlechter; P. setchuenica Kraenzlin; P. stenantha (J. D. Hooker) Soó subsp. omeiensis (Rolfe) Soó.

Plants 35-80 cm tall. Rootstock tuberous, cylindric to narrowly ovoid. Stem erect, stout, with several tubular sheaths at base, (3 or)4-6-leaved. Leaves cauline, alternate, widely spaced, elliptic to narrowly elliptic, 10-18 × 3-7.5 cm, base sheathing, apex obtuse or acute. Peduncle robust, with 3 or 4 foliaceous, lanceolate bracts; rachis 10-18 cm, 10-28-flowered; floral bracts narrowly lanceolate, 20-45 mm, basal ones exceeding flowers, apex acuminate. Flowers white; pedicel and ovary straight to slightly arcuate, cylindric, 18-25 mm. Dorsal sepal erect, forming a hood with petals, ovate, cymbiform, 7-8 × 5-6 mm, glabrous, 3-veined, apex obtuse or acute; lateral sepals reflexed, ovate, oblique, 8-9 × 4-5 mm, glabrous, 3-veined, apex acute. Petals linear, 6-7 × ca. 1.5 mm, 1-veined, apex obtuse; lip pendulous or spreading, linear, 13-15(-20) mm, entire, apex obtuse; spur pendulous, cylindric to filiform, 25-60 mm, much longer than ovary, slender, apex acute. Column 1-2 mm; staminodes conspicuous; anther locules almost parallel; connective rather broad, apex subretuse; pollinia obovoid, with slender caudicles and linear-ellipsoid viscidia; rostellum erect, broadly triangular, short; stigma lobes confluent, concave, lying directly below rostellum. Fl. Mar-Jul, fr. May-Sep. 2n = 42.

Forests, grasslands on slopes; 600-2600 m. Anhui, Chongqing, Gansu, Guangxi, Guizhou, Henan, Hubei, Hunan, Jiangsu, Shaanxi, Sichuan, Yunnan, Zhejiang [Japan, Korea].


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