"Eriophorum (cottongrass, cotton-grass or cottonsedge) is a genus of flowering plants in the family Cyperaceae, the sedge family. They are found throughout the arctic, subarctic and ...
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temperate portions of the Northern Hemisphere in acid bog habitats, being particularly abundant in Arctic tundra regions.
They are herbaceous perennial plants with slender, grass-like leaves. The seed heads are covered in a fluffy mass of cotton-like fibers which are carried on the wind to aid dispersal. In cold Arctic regions, these masses of translucent fibres also serve as ´down´ – increasing the temperature of the reproductive organs during the Arctic summer by trapping solar radiation." - (en.wikipedia.org 02.12.2019)