Eriophorum
bog cotton, cotton-grass
5 species
1 subspecies and varieties
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Eriophorum angustifoliummany-spiked bog cotton, many-spiked cotton-grass
Distribution: Circumboreal at high latitudes, extending south into Oregon, Colorado and New York.
Habitat: Cold swamps and bogs at moderate to high elevations in the mountains.
Origin: Native
Flowers: July - August
ssp. angustifolium – many-spiked cottongrass
Eriophorum chamissonisChamisso's cotton-grass, russet cottongrass
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska south to Oregon, east across the northern half of North America to the Atlantic Coast.
Habitat: Swamps and other wet places at moderate elevations in the mountains, descending to sea level along the coast.
Origin: Native
Flowers: May-August
Eriophorum gracileslender cottongrass
Distribution: Alaska, Canada and the northern half on the United States
Habitat: Wet places, mid- to high elevation in the mountains
Origin: Native
Flowers: May - August
Eriophorum virginicumtawny cottongrass
Origin: Introduced
Eriophorum viridicarinatumtassel cottongrass
Origin: Native
Flowers: June - July