Species: Branched Bur-reed (Sparganium erectum)
Other names: kjempe-piggknopp
Norwegian name: Kjempepiggknopp
Systematics :
| Kingdom | Planteriket (Plantae) | ||||||||
| Artificial group | Vascular plant (Tracheophytes) | ||||||||
| Superphylum | Frøplanter (Spermatophyte) | ||||||||
| Phylum | Dekkfrøete blomsterplanter (Magnoliophyta) | ||||||||
| Klasse | Enfrøblader (Liliopsida) | ||||||||
| Family | Piggknoppfamilien (Sparganiaceae) | ||||||||
| Genus | Piggknoppslekta (Sparganium) | ||||||||
| Species | Branched Bur-reed (Sparganium erectum) | ||||||||
| Subspecies | Blankpiggknopp (Sparganium erectum subsp. microcarpum) | ||||||||
| Subspecies | Nebbpiggknopp (Sparganium erectum subsp. neglectum) | ||||||||
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