bullrush has definitions from the field of botany
1
[ noun ] (botany) 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

Related terms

cattail

2
[ noun ] (botany) tall rush with soft erect or arching stems found in Eurasia, Australia, New Zealand, and common in North America

Related terms

rush Juncus

*