Floating Bur-reed, Narrowleaf Bur-reed, Narrow-leaf Bur-reed: Sparganium angustifolium (Synonyms: Sparganium angustifolium var. multipedunculatum, Sparganium emersum var. multipedunculatum, Sparganium multipedunculatum, Sparganium simplex var. multipedunculatum)
Northern Bur-reed: Sparganium hyperboreum (Synonym: Sparganium natans var. submuticum)
Small Bur-reed: Sparganium natans (Synonym: Sparganium minimum)