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CommentsGiant Bur-Reed is the largest and most common Sparganium sp. in Illinois. It is also easy to identify during the flowering period because each one of its pistillate flowers usually has 2 styles, rather than a single style. Its achenes are also distinctive because of their obconic-angular shape; other Sparganium spp. within the state have achenes with more ellipsoid shapes. This interesting plant should be used in wetland restorations more often.