Sparganium erectum, the simplestem bur-reed or branched bur-reed, is a perennial plant species in the genus Sparganium.
The larvae of the moth Plusia festucae feed on Sparganium erectum.
Subspecies: Sparganium erectum subsp. microcarpum (Neuman) Domin (synonym: Sparganium microcarpum (Neuman) Celak.)
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