It grows along shores in shallow water as an upright and stiff plant. Historically the Flowering Rush was a common food in Northern Europe particularly Russia where food sometimes was scarce. When depths are greater than Flowering rush is a perennial freshwater aquatic plant that grows in lakes, rivers, and wetlands. Flowering rush blooms between June and September. Flowering Rush was first collected in Montana along the north margin of Flathead Lake in 1962. Flowering-rush is an introduced aquatic plant from Eurasia that has become a serious invasive weed in the Great Lakes. Flowering rush has already invaded the Great Lakes region and has caused significant impacts. This plant has the potential to invade and disrupt native marshlands in the Columbia River Basin and the impact of flowering rush on spawning habitat for native salmonid species is a growing concern. Flowering Rush is more frequently (and much more easily) found in ponds in gardens and parks. “Flowering rush infestations can displace native vegetation and result in reduced water quality which may disrupt valuable fish and wildlife habitat. This plant doesn't provide the necessities of shelter for our shoreline birds it also isn't strong enough for the red winged black bird to perch on leaving them to find other habitat elsewhere. Habitat. This plant thrives in freshwater wetlands; commonly found along edges of rivers and lakes. In New England it is common only in the Lake Champlain Valley, and rare elsewhere. Common Name: Flowering Rush Scientific Name: Butomus umbellatus Habitat: shorelines - mainly in water Provincial Designation: Prohibited Noxious Prohibited Noxious weeds are plant species designated in the Alberta Weed Control Act.Prohibited noxious weeds must be destroyed when found, meaning all growing parts need to be killed or the plant's reproductive mechanisms need to be rendered non-viable. Waterbodies that flucutate in water levels are vulnerable to flowering rush infestations. Flowering rush is an aggressive, invasive aquatic weed that has been documented in Idaho, Washington, Oregon, and Montana. It is now occurs in Sanders, Lake, and Flathead Counties, and in Flathead Lake, upper and lower Flathead Rivers, Clark Fork River into Lake Pend Oreille (Idaho), Thompson Falls Reservoir, Noxon Reservoir, and Cabinet Gorge Reservoir. However, flowering rush is a popular and common plant for… Flowering rush displaces native vegetation such as rushes and cattails which are primary habitat for wildlife and primarily waterfowl. It spreads quickly through bulbils (small bulb-like structure), and fragments of the rhizomes (a type of underground stem). Flowering rush has invaded the shores of Michigan waterways since the early 1900’s, affecting the Detroit River as early as 1918, but in recent years has become a much greater problem, and is listed as a restricted noxious weed by the U.S. Department of Agriculture. It can also grow suspended in water up to 3-6 m deep. In deeper water, it grows beneath the water with the leaves floating on the surface. Habitat. Is It Here Yet? Habitat Flowering rush grows along lake shores, slow moving waters, irrigation ditches and in wetlands. Habitat & Ecology. Submerged plants often don’t flower. 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