Platanthera mandarinorum subsp. mandarinorum var. oreades ("Yamasagiso")

Japanese name: ヤマサギソウ （山鷺草）
Scientific name: Platanthera mandarinorum subsp. mandarinorum var. oreades

[Overview]
A perennial 20–40 cm tall, growing in sunny mountain grasslands.
A terrestrial orchid.
Part of the roots is thickened into a spindle shape.
The stem is slightly ridged.
The leaves are simple and alternate; the single leaf on the lower part of the stem is large, linear-oblong, 5–11 cm long and 1–1.5 cm wide, with an entire margin.
The 2–5 leaves on the upper part of the stem are lanceolate and gradually become smaller.
A raceme bears about 10 flowers.
The bracts are lanceolate.
The flowers are yellowish green; the dorsal sepal is ovate, the lateral petals are sickle-shaped, and the lip is tongue-shaped and somewhat fleshy.
A spur 0.7–1.2 cm long extends behind the flower.

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