Cottongrasses of the Columbia River Gorge of Oregon and Washington
The Genus Eriophorum
Many-spiked Cottongrass: Eriophorum angustifolium ssp. angustifolium
Many-spike Cottongrass, Many-spiked Cottongrass, Tall Cottongrass: Eriophorum angustifolium ssp. angustifolium (Synonym: Eriophorum polystachion)