Flowering Rush On the Water Side at Zwaag, The Netherlands, Europe. June 28, 2009
In the Netherlands the plant is protected by government, the Dutch name is Zwanenbloem.
Flowering Rush is the sole genus in the monogenetic plant family Butomaceae, containing the single species Butomus Umbellatus, also known as Butomus or Grass Rush.
The plant is a rhizomatous perennial aquatic plant. Its name is derived from Greek bous, meaning “cow”, “ox” etc and tome, a cut (the verb ‘temnein’ meaning “to cut”), which refers to the plant’s swordlike leaves.
Other than suggested by its English common name, it is not a true rush. It is native to Eurasia and grows on the margins of still and slowly moving water down to a depth of about 3 m. It has pink flowers. Introduced into North America as an ornamental plant it has now become a serious invasive weed in the Great Lakes area. In Israel, one of its native countries, it is an endangered species due to the dwindling of its habitat.
The plant has linear leaves up to 1 metre long, or more. The leaves are triangular in cross-section and arise in two rows along the rhizome.