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This species is accepted, and its native range is Central & E. Canada to N. Central & E. U.S.A.
A specimen from Kew's Herbarium

[GB]
Morphology General Habit
Annual, or perennial; short-lived. Culms erect; reed-like; 90-300 cm long; spongy. Ligule an eciliate membrane; 0.3-20 mm long. Leaf-blades 10-40 mm wide. Leaf-blade surface scaberulous; glabrous.
Morphology Reproductive morphology Inflorescences
Monoecious; with male and female spikelets in the same inflorescence. Inflorescence a panicle. Panicle open; ovate; 30-50 cm long. Primary panicle branches 15-20 cm long. Sexes segregated; on unisexual branches; with male below. Spikelets solitary. Fertile spikelets pedicelled. Male spikelets pedicelled. Pedicels bearing a few hairs; tip cupuliform.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 20 mm long; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes both absent or obscure.
Morphology Reproductive morphology Flowers Florets
Fertile florets female. Fertile lemma lanceolate; 20 mm long; chartaceous; pallid; without keel; 3 -veined. Lemma surface scaberulous; rough generally. Lemma margins interlocking with palea margins. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 10-20 mm long overall. Palea 1 length of lemma; 3 -veined; without keels.
Morphology Reproductive morphology Flowers
Lodicules 2. Anthers 6.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; linear.
Morphology Reproductive morphology Inflorescences Spikelets
Male spikelets distinct from female; linear (1-1.4mm wide); 7-9 mm long. Male spikelet glumes absent. Male spikelet lemma 5 -veined; muticous. Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 20 mm long; falling entire.
sex Male
Male spikelets distinct from female; linear (1-1.4mm wide); 7-9 mm long. Male spikelet glumes absent. Male spikelet lemma 5 -veined; muticous.
Distribution
Europe: eastern. Asia-temperate: Caucasus. North America: western Canada, eastern Canada, northwest USA, north-central USA, northeast USA, south-central USA, and southeast USA.
Reference
Oryzeae. Dore 1993.

Native to:

Alabama, Alberta, British Columbia, Connecticut, Delaware, District of Columbia, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Manitoba, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Nebraska, New Brunswick, New Hampshire, New Jersey, New York, Newfoundland, North Carolina, North Dakota, Nova Scotia, Ohio, Ontario, Pennsylvania, Prince Edward I., Québec, Rhode I., Saskatchewan, South Carolina, South Dakota, Tennessee, Vermont, Virginia, Wisconsin

Introduced into:

Baltic States, Belarus, California, Central European Rus, East European Russia, Northwest European R, Ukraine

Zizania aquatica L. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Munro, Gen Wm. [s.n.], Canada K000307619
Munro, Col Wm. [s.n.], Canada K000307618

First published in Sp. Pl.: 991 (1753)

Accepted by

  • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
  • Fedorov, A.A. (ed.) (1999). Flora of Russia. The European part and bordering regions 1: 1-546. A.A. Balkema, Rotterdam, Broekfield.
  • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
  • Tutin, T.G. & al. (eds.) (1980). Flora Europaea 5: 1-452. Cambridge University Press.

Literature

Kew Backbone Distributions

  • Fedorov, A.A. (ed.) (1999). Flora of Russia. The European part and bordering regions 1: 1-546. A.A. Balkema, Rotterdam, Broekfield.
  • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
  • Tutin, T.G. & al. (eds.) (1980). Flora Europaea 5: 1-452. Cambridge University Press.

GrassBase - The Online World Grass Flora
http://creativecommons.org/licenses/by-nc-sa/3.0

Herbarium Catalogue Specimens
Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0