bulrush

(noun) tall marsh plant with cylindrical seed heads that explode when mature shedding large quantities of down; its long flat leaves are used for making mats and chair seats; of North America, Europe, Asia and North Africa. Synonyms: cat's-tail, bullrush, nailrod, reed mace, reedmace, Typha latifolia.

(noun) tall rush with soft erect or arching stems found in Eurasia, Australia, New Zealand, and common in North America. Synonyms: bullrush, common rush, soft rush, Juncus effusus.