Plants 11–130 cm or more. Leaves few–several, ascending to recurved-spreading, scattered along stem, gradually reduced to bracts distally; blade linear, linear-lanceolate, oblong, or oblanceolate, 3.5–32 × 0.3–7 cm. Spikes very lax to very dense. Flowers resupinate, rather showy, conspicuous, white; lateral sepals spreading to reflexed; petals ovate-to linear-lance-falcate, margins entire; lip descending or apex adhering to dorsal sepal and petal apices, linear-lanceolate to lanceolate, without basal thickening, 4–11 × 2–5 mm, base slightly rounded-dilated to orbiculate, rarely rhombic, margins entire; rostellum lobes parallel to slightly divergent, directed downward, very small, obscure, rounded; pollinaria straight; pollinia remaining enclosed in anther sacs; ovary rather slender to stout, 5–15 mm. 2n = 42.
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An orchid. It can be 1 m high. There are 2 leaves up to 30 cm long. There are about 70 flowers on the stalk. Each flower is about 2.5 cm across.
Wet soils of swamps, bogs, banks of springs and streams. Wet meadows, tundra, marshes, fens, stream banks, shores, ditches, seeping slopes, roadsides; at elevations from sea level to 3,100 metres.
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It is a temperate plant. California.
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