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When flowering, an umbrella shaped cluster flowers can be found at the top of a triangular green stem. Individual flowers are composed of three white and pink petals.
Singular and small stands of plants may have little impact on a water body, but this plant often grows into very dense stands that can limit recreation along the shoreline.
Flowering rush stands spread by rhizomes (underground stems), floating seeds, and by root fragments that break off during removal. The plant can also be spread via seed or root transportation by boats.