Plants 20–125 cm or more. Leaves few–several, ascending to recurved-spreading, scattered along stem or sometimes clustered near base, gradually to abruptly reduced to bracts distally; blade ovate-, oblong-, or oblanceolate-elliptic to linear, 6.5–30 × 0.8–5 cm. Spikes very lax to dense. Flowers resupinate, not showy, green to yellowish green; lateral sepals reflexed or sometimes spreading; petals ovate-to lance-falcate, margins entire; lip descending or reflexed, oblong or linear to linear-oblong or linear-lanceolate, a thickened median basal ridge present or absent, 4.5–11 × 0.6–3 mm, margins entire; spur slightly clavate, cylindric, or tapering toward usually rather acute apex; rostellum lobes somewhat divergent, directed forward, rounded-subangular, rather prominent, to strongly divergent, very small, rounded, obscure; pollinaria straight; pollinia remaining enclosed in anther sacs; viscidia orbiculate to oblong; ovary rather slender to stout, mostly 5–14 mm. 2n = 42.
Found mainly along the sides of streams or in boggy places in montane coniferous forests; at elevations from 1,200-3,300 metres. Wet meadows, marshes, fens, stream banks, shores, seeping slopes; at elevations up to 3,500 metres.
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It is a warm temperate plant.
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