About Sparganium glomeratum (Laest. ex Beurl.) Beurl.
Sparganium glomeratum, commonly known as clustered bur-reed, is a species of bur-reed. It is an aquatic plant native to high-elevation lakes and marshes across Europe, Asia, and North America. Because North American populations are scarce and scattered, researchers previously doubted that the species was native to the region and suspected it was introduced. A recent herbarium survey identified additional localities for the species in central Canada, leading to the conclusion that Sparganium glomeratum is a circumpolar species.
