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This species is accepted, and its native range is Aleutian Islands to Canada and W. U.S.A.

[GB]
Morphology General Habit
Perennial. Culms 50-150 cm long. Leaf-sheaths glabrous on surface, or pilose. Ligule an eciliate membrane; 2-8 mm long; erose. Leaf-blades 8-15 mm wide. Leaf-blade surface glabrous, or pilose; hairy adaxially, or on both sides.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; ovate; 10-35 cm long; with spikelets clustered towards branch tips. Primary panicle branches appressed, or ascending, or spreading, or drooping; bearing 1-2 fertile spikelets on each lower branch. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 4-12 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; compressed strongly; 20-40 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes eventually visible between lemmas.
Fertile
Spikelets comprising 4-12 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; compressed strongly; 20-40 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes eventually visible between lemmas.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; shorter than spikelet. Lower glume lanceolate; 8-10 mm long; 0.75 length of upper glume; membranous; 1-keeled; 3-5 -veined. Lower glume apex acute. Upper glume lanceolate; 10-13 mm long; 1.1-1.4 length of adjacent fertile lemma; membranous; 1-keeled; 5-7 -veined. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 7-12 mm long; chartaceous; without keel; 5-7 -veined. Lemma surface glabrous, or puberulous. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn subapical; 7-12 mm long overall. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 3; 1(-6) mm long; eventually exserted, or retained within floret. Ovary with a fleshy appendage above style insertion; pubescent on apex.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; hairy at apex; apex fleshy. Hilum linear.
Distribution
Australasia: New Zealand. North America: Subarctic, western Canada, and northwest USA.
Reference
Bromeae. Fl Pac NW 1994.
Diagnostic
Veins a quarter to a third width of space between.

Native to:

Alaska, Alberta, Aleutian Is., British Columbia, California, Idaho, Manitoba, Ontario, Oregon, Québec, Washington

Introduced into:

Austria, Belgium, France, Germany, New Zealand South

Bromus sitchensis Trin. appears in other Kew resources:

First published in Mém. Acad. Imp. Sci. St.-Pétersbourg, Sér. 6, Sci. Math. 2: 173 (1832)

Accepted by

  • Adolphy, K. & al. (2021). Beiträge zur Flora Nordhein-Westfalens aus dem Jahr 2020 Jahrbuch des Bochumer Botanischen Vereins 12: 199-278.
  • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
  • Dimopoulos, P., Raus, T., Bergmeier, E., Constantinidis, T., Iatrou, G., Kokkini, S., Strid, A., & Tzanoudakis, D. (2013). Vascular plants of Greece. An annotated checklist: 1-372. Botanic gardens and botanical museum Berlin-Dahlem, Berlin and Hellenic botanical society, Athens.
  • Edgar, E & Connor, H.E. (2010). Flora of New Zealand, ed. 2, 5: 1-650. R.E.Owen, Government Printer, Wellington.
  • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
  • Hohla, M. (2012). Bromus sitchensis - neu für Österreich, Plantago coronopus - neu für Oberösterreich sowie weitere Beiträge zur Kenntnis der Flora des Innviertels Stapfia 97: 180-192.

Literature

Kew Backbone Distributions

  • Adolphy, K. & al. (2021). Beiträge zur Flora Nordhein-Westfalens aus dem Jahr 2020 Jahrbuch des Bochumer Botanischen Vereins 12: 199-278.
  • Edgar, E & Connor, H.E. (2010). Flora of New Zealand, ed. 2, 5: 1-650. R.E.Owen, Government Printer, Wellington.
  • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
  • Hohla, M. (2012). Bromus sitchensis - neu für Österreich, Plantago coronopus - neu für Oberösterreich sowie weitere Beiträge zur Kenntnis der Flora des Innviertels Stapfia 97: 180-192.

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