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This species is accepted, and its native range is Subarctic America to U.S.A.
A specimen from Kew's Herbarium

[GB]
Morphology General Habit
Perennial. Rhizomes elongated. Culms 40-180 cm long. Culm-internodes smooth. Lateral branches lacking. Leaf-sheaths smooth, or antrorsely scabrous; glabrous on surface. Ligule an eciliate membrane; 2-10 mm long; lacerate. Collar glabrous, or pubescent. Leaf-blades flat, or involute; 3-8 mm wide. Leaf-blade surface scabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; lanceolate, or ovate; dense, or loose; 15-25 cm long. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 2.5-6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 0.75-1 length of lemma.
Fertile
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 2.5-6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 0.75-1 length of lemma.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume elliptic; 2.5-6 mm long; 0.75-1 length of upper glume; chartaceous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface scabrous. Lower glume apex acute. Upper glume elliptic; 2.5-6 mm long; 1-1.5 length of adjacent fertile lemma; chartaceous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume surface scabrous. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 2.5-6 mm long; membranous; without keel; 5 -veined. Lemma apex dentate; 2 -fid; awned; 3 -awned. Principal lemma awn dorsal; arising 0.4-0.8 way up back of lemma; 2-6 mm long overall. Lateral lemma awns arising on apex of lobes; 0.2-1 mm long. Palea 0.75-0.8 length of lemma; hyaline; 2 -veined. Palea keels scaberulous. Rhachilla extension 0.2-1.3 mm long; pilose.
Morphology Reproductive morphology Flowers
Lodicules 2. Anthers 3; 1-1.7 mm long. Stigmas 2.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Hilum punctiform.
Distribution
North America: Subarctic, western Canada, eastern Canada, northwest USA, north-central USA, northeast USA, southwest USA, south-central USA, and southeast USA.
Reference
Aveneae. Fl Pac NW 1993.

Native to:

Alaska, Alberta, Arizona, British Columbia, California, Colorado, Connecticut, Delaware, District of Columbia, Georgia, Greenland, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Labrador, Maine, Manitoba, Maryland, Massachusetts, Michigan, Minnesota, Missouri, Montana, Nebraska, Nevada, New Brunswick, New Hampshire, New Jersey, New Mexico, New York, Newfoundland, North Carolina, North Dakota, Northwest Territorie, Nova Scotia, Nunavut, Ohio, Ontario, Oregon, Pennsylvania, Prince Edward I., Québec, Rhode I., Saskatchewan, South Dakota, Tennessee, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming, Yukon

Introduced into:

West Himalaya

Calamagrostis canadensis (Michx.) P.Beauv. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Pursh, F.T. [s.n.], Northern America K000838367
Pursh, F.T. [s.n.], Northern America K000838366
Schweinitz, L.D.von. [s.n.], Northern America Calamagrostis cinnoides K000838364
Nuttall, T. [s.n.], USA Calamagrostis cinnoides K000838363
Torrey, J. [s.n.] Calamagrostis cinnoides K000838365

First published in Ess. Agrostogr.: 15, 157 (1812)

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.
  • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
  • Kandwal, M.K. & Gupta, B.K. (2009). An update on grass flora of Uttarkhand Indian Journal of Forestry 32: 657-668.

Literature

Kew Backbone Distributions

  • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
  • Ibrahim, K.M. & Peterson, P.M. (2014). Grasses of Washington, D.C. Smithsonian Contributions to Botany 99: 1-128.
  • Kandwal, M.K. & Gupta, B.K. (2009). An update on grass flora of Uttarkhand Indian Journal of Forestry 32: 657-668.

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