bul·rush
noun/ˈbʊlrʌʃ/
/ˈbʊlrʌʃ/
(also bullrush)
- a tall plant with long narrow leaves and a long brown head of flowers, that grows in or near water

enlarge image藨草;宽叶香蒲;灯芯草 Word Originlate Middle English: probably from bull in the sense ‘large or coarse’, as in words such as bullfrog.