Eriophorum angustifolium is a hardy, herbaceous, rhizomatous, perennial sedge.
It is able to endure in a variety of environments in the temperate, subarctic and arctic regions of Earth.
It is commonly known as Common Cottongrass or Common Cottonsedge and is also know as Bog Cotton.
It is native to North America, North Asia, and Northern Europe and is often found on peat or acidic soils, in open wetland, heath or moorland.
It begins to flower in April or May and, after fertilisation in early summer, the small, unremarkable brown and green flowers develop distinctive white bristle-like seed-heads that resemble tufts of cotton.
Combined with its ecological suitability to bog, these characteristics give rise to the plant's alternative name, bog cotton.
Reference: Wikipedia