4 species
1 subspecies and varieties
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Myosurus ×alopecuroides
Distribution: Occurring east of the Cascades crest in Washington; Washington south, east of the Cascades, to Oregon, east to Idaho.
Habitat: Sagebrush-steppe.
Origin: Native
Flowers: March-May
Myosurus apetalusbristly mouse-tail, sedge mouse-tail
Distribution: East side of the Cascades, British Columbia to California, east to Wyoming
Habitat: Moist areas and vernal streambeds, mostly low elevation grasslands and sagebrush, occasionally to subalpine
Origin: Native
Flowers: Late March - early June
var. borealis – sedge mouse-tail
Myosurus minimustiny mousetail
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to south-central Canada and across the central U.S. to the southeastern states.
Habitat: Wet places, especially vernal pools.
Origin: Native
Flowers: April-June
Myosurus sessilisshortstemmed mouse-tail, vernal pool mouse-tail
Distribution: Known from Klickitat County in Washington; South-central Washington south to north-central Oregon, also in central California.
Habitat: Vernal pools.
Origin: Native
Flowers: April-June