Wood Club-rush (Scirpus sylvaticus), fam. Cyperaceae.
Most Club-rushes have scaly leaves, but this species is noted for its broad and long leaves, which in addition are folded like the letter M in cross-section, increasing their bending strength. The leaves of Wood Club-rush are quite different from Cattail (Bulrush), because the latter has sword-shaped leaves, with no top or bottom and only to sides, arranged in the vertical plane. Wood Club-rush has trihedral stems, bearing the panicle inflorescences at the top. The stems are hollow inside, that is why they make a distinctive rustle when a human is passing through the club-rush thickets, or in the wind.
Club-rush is used for weaving household bags, baskets, mats, and carpets.