Flowering rush is an introduced species in North America that originates in Eurasia, and was brought to North America as an ornamental plant in water gardens. It is now found across the northern US states from Idaho to Vermont, and in Canada (AB, BC, MB, NB, NS, ON, PE, QC) (USDA 2010
). While it is often rare in its native range, it has become a serious pest where it is introduced, including in the Great Lakes area. In British Columbia, it is known from only two locales: Hatzic Lake near Mission and a single location in Surrey, on West Creek, and may be more frequent but overlooked. This is a distinctive flowering plant species. It is a relatively tall (100-150 cm) rhizomatous (thick rhizomes) perennial that is rush-like in appearance (narrow leaves) with an umbel of pink flowers. It inhabits shorelines but can tolerate deeper water to depths of 2 m (Global Invasive Species Database 2010
). It flowers through the summer from June to August.