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

22. Platanthera densa Freyn, Oesterr. Bot. Z. 46: 96. 1896.

多叶舌唇兰 duo ye she chun lan

Platanthera chloranthella Nakai; P. chlorantha var. orientalis Schlechter; P. densa subsp. orientalis (Schlechter) Efimov.

Plants ca. 30 cm tall. Rootstock narrowly fusiform, shortly 2-lobed, ca. 4 × 1.3 cm. Stem erect, with 2 tubular sheaths at base, 2-leaved. Leaves cauline, elliptic, 6-7 × 2-3 cm, contracted and clasping at base, apex obtuse. Peduncle with 1 lanceolate bract; rachis ca. 6 cm, subdensely 15-flowered; floral bracts ovate-lanceolate, ca. 15 × 5 mm, slightly exceeding ovary. Flowers green; pedicel and ovary ca. 8 mm. Dorsal sepal erect, forming a hood with petals, cordate-ovate, ca. 5 × 7 mm, apex obtuse; lateral sepals elliptic, oblique, shorter and narrower than dorsal sepal. Petals lanceolate, ca. 3 mm, apex abruptly cuspidate; lip spreading forward, ligulate, ca. 10 × 2.5 mm, entire, apex obtuse; spur spreading horizontally, ca. 20 mm, much longer than ovary. Fl. Jun.

Alpine meadows. China (without precise locality) [Korea, Russia (Far East)].

Material of this species has not been seen. It is possibly conspecific with Platanthera minor.


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