Sparganium angustifolium var. multipedunculatum (Morong) Brayshaw
Sparganium chlorocarpum Rydb.
Sparganium chlorocarpum var. acaule (Beeby ex Macoun) Fernald
Sparganium chlorocarpum f. acaule (Beeby ex Macoun) E.G.Voss
Sparganium chlorocarpum var. typicum R.T.Clausen
Sparganium diversifolium var. acaule (Beeby ex Macoun) Fernald & Eames
Sparganium emersum var. acaule (Beeby) A.Haines
Sparganium emersum subsp. acaule (Beeby ex Macoun) C.D.K.Cook & M.S.Nicholls
Sparganium emersum f. angustifolium (Morong) Soó
Sparganium emersum f. gracile (Meinsh.) Soó
Sparganium emersum var. multipedunculatum (Morong) Reveal
Sparganium emersum f. simile (Meinsh.) Soó
Sparganium emersum subsp. simplex (Huds.) Soó
Sparganium emersum f. submersum (Glück) Soó
Sparganium emersum f. subvaginatum (Meinsh.) Soó
Sparganium longissimum (Fr.) Fritsch
Sparganium multipedunculatum (Morong) Rydb.
Sparganium simile Meinsh.
Sparganium simplex Huds.
Sparganium simplex var. acaule Beeby
Sparganium simplex f. angustifolium C.L.Beckm.
Sparganium simplex var. multipedunculatum Morong
Sparganium subvaginatum Meinsh.
Sparganium wirtgeniorum (Graebn.) Rouy
Sparganium emersum is a species of flowering plant in the
cat-tail family known by the common names European bur-reed[2] and unbranched bur-reed.[3] It has a
circumboreal distribution, occurring throughout the northern latitudes of Eurasia and North America. It is an
aquatic plant, growing in shallow water bodies such as ponds and streams. It can become abundant at times. It is a perennial herb producing a floating stem up to 2 meters long. The leaves may be limp and floating or stiff and erect, emerging above the water surface. The leaves are flat and straplike, sometimes with a triangular, keeled base that can help distinguish it from the similar Sparganium angustifolium. It is
monoecious, individual plants bearing both male and female
inflorescences. These are spherical, the male inflorescence a ball of
stamens and the female inflorescence a ball of developing fruits growing beneath the male spheres.
References
^"Sparganium emersum Rehmann". Plants of the World Online. Board of Trustees of the Royal Botanic Gardens, Kew. 2017. Retrieved 23 December 2020.
^USDA, NRCS (n.d.).
"Sparganium emersum". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 24 November 2015.