ワタスゲ
"Eriophorum vaginatum" is a 30– to 60-cm-high tussock-forming plant with extremely narrow, almost hair-like leaves. On the flowering stems there is a single, inflated leaf-sheath, without a lamina, hence the species epithet ("sheath" is "vagina" in latin). The inflorescence is a dense, tufted, solitary, spike. Fruiting stems elongate considerably, reaching well above the leaves.