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This species is accepted, and its native range is W. Canada to Central America.
A specimen from Kew's Herbarium

[GB]
Morphology General Habit
Perennial; caespitose. Culms erect, or geniculately ascending; 60-90 cm long. Culm-internodes distally pubescent. Leaf-sheaths pilose; with reflexed hairs. Ligule an eciliate membrane; 2-3.5 mm long; erose; obtuse. Leaf-blades 15-25 cm long; 6-12 mm wide. Leaf-blade surface glabrous to pilose; hairy adaxially, or on both sides.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; lanceolate; 10-30 cm long. Primary panicle branches appressed, or ascending. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 6-9 fertile florets; with diminished florets at the apex. Spikelets ovate; laterally compressed; compressed strongly; 25-40 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 6-9 fertile florets; with diminished florets at the apex. Spikelets ovate; laterally compressed; compressed strongly; 25-40 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 7-9 mm long; 0.9 length of upper glume; chartaceous; 1-keeled; 3-5 -veined. Lower glume surface smooth, or asperulous; glabrous, or pubescent. Lower glume apex acuminate. Upper glume lanceolate; 9-11 mm long; 0.8-0.9 length of adjacent fertile lemma; chartaceous; 1-keeled; 5-7 -veined. Upper glume surface smooth, or asperulous; glabrous to pubescent. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; laterally compressed; 11-14 mm long; chartaceous; much thinner on margins; keeled; distinctly keeled; 7-9 -veined. Lemma lateral veins distinct. Lemma surface glabrous, or pubescent. Lemma margins eciliate, or pubescent. Lemma apex awned; 1 -awned. Principal lemma awn subapical; 4-7 mm long overall. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 3; 1-4 mm long. Ovary with a fleshy appendage above style insertion; pubescent on apex.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; apex fleshy.
Distribution
Asia-temperate: China. North America: western Canada, northwest USA, north-central USA, northeast USA, southwest USA, south-central USA, and Mexico.
Reference
Bromeae. Pavlick 2004.

Native to:

Alberta, Arizona, British Columbia, California, Colorado, Connecticut, Costa Rica, El Salvador, Guatemala, Honduras, Idaho, Illinois, Iowa, Kansas, Maine, Massachusetts, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Montana, Nebraska, Nevada, New Hampshire, New Mexico, New York, Oregon, Saskatchewan, South Dakota, Utah, Washington, Wyoming

Introduced into:

Alaska, China North-Central, Czechoslovakia

Bromus marginatus Nees ex Steud. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Baker, C.F. [333], Colorado K000913853
Shear, C.L. [1815], Oregon K000913852

First published in Syn. Pl. Glumac. 1: 322 (1854)

Accepted by

  • Dávila, P., Mejia-Saulés, M.T., Gómez-Sánchez, N., Valdés-Reyna, J., Ortíz, J.J., Morín, C., Castrejón, J. & Ocampo, A. (2006). Catálogo de las Gramíneas de México: 1-671. CONABIO, México city.
  • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
  • Govaerts, R. (1996). World Checklist of Seed Plants 2(1, 2): 1-492. MIM, Deurne.
  • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.

Not accepted by

  • Allred, K.W. (2012). Flora Neomexicana, ed. 2, 1: 1-599. Range Science Herbarium, Las Cruces, New Mexico. [Cited as Bromus carinatus.]

Literature

Kew Backbone Distributions

  • Danihelka, J. Chrtek, J. & Kaplan, Z. (2012). Checklist of vascular plants of the Czech Republic Preslia. Casopsi Ceské Botanické Spolecnosti 84: 647-811.
  • Dávila, P., Mejia-Saulés, M.T., Gómez-Sánchez, N., Valdés-Reyna, J., Ortíz, J.J., Morín, C., Castrejón, J. & Ocampo, A. (2006). Catálogo de las Gramíneas de México: 1-671. CONABIO, México city.
  • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
  • Saarela, J.M., Peterson, P.M. & Váldes-Reyna, J. (2014). A taxonomic revision of Bromus (Poaceae: Pooideae: Bromeae) in México and Central America Phytotaxa 185(1): 1-147.
  • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.

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