Bromus marginatusNees ex Steud.

mountain brome

WFO wfo-0000855972 Accepted WFO 2026-06 7 photographs CC BY

Plate 1 figs. a–g · 2 observations

This species has been photographed under an open licence only 2 times, so some figures below are different views of the same plant, taken on the same day, rather than different individuals. They are usually different parts of it: the leaf, the flower, the bark.

Bromus marginatus, photographed by Matt Berger
fig. a Matt Berger, CC BY 4.0 / 2021-07-14 / obs. 143689175
Bromus marginatus, photographed by Matt Berger
fig. b Matt Berger, CC BY 4.0 / obs. 149259561
Bromus marginatus, photographed by Matt Berger
fig. c Matt Berger, CC BY 4.0 / obs. 143689124
Bromus marginatus, photographed by Matt Berger
fig. d Matt Berger, CC BY 4.0 / obs. 149259554
Bromus marginatus, photographed by Matt Berger
fig. e Matt Berger, CC BY 4.0 / obs. 143689249
Bromus marginatus, photographed by Matt Berger
fig. f Matt Berger, CC BY 4.0 / obs. 143689290
Bromus marginatus, photographed by Matt Berger
fig. g Matt Berger, CC BY 4.0 / obs. 143689366

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Native range 34 botanical countries

Regions where Bromus marginatus is native: Alberta, Arizona, British Columbia, California, Colorado, Connecticut, 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, Costa Rica, El Salvador, Guatemala, Honduras AlbertaArizonaBritish ColumbiaCaliforniaColoradoConnecticutIdahoIllinoisIowaKansasMaineMassachusettsMexico CentralMexico GulfMexico NortheastMexico NorthwestMexico SoutheastMexico SouthwestMontanaNebraskaNevadaNew HampshireNew MexicoNew YorkOregonSaskatchewanSouth DakotaUtahWashingtonWyomingCosta RicaEl SalvadorGuatemalaHonduras
Native distribution of Bromus marginatus, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows.
RegionTDWG codeContinent
Alberta ABT NORTHERN AMERICA
Arizona ARI
British Columbia BRC
California CAL
Colorado COL
Connecticut CNT
Idaho IDA
Illinois ILL
Iowa IOW
Kansas KAN
Maine MAI
Massachusetts MAS
Mexico Central MXC
Mexico Gulf MXG
Mexico Northeast MXE
Mexico Northwest MXN
Mexico Southeast MXT
Mexico Southwest MXS
Montana MNT
Nebraska NEB
Nevada NEV
New Hampshire NWH
New Mexico NWM
New York NWY
Oregon ORE
Saskatchewan SAS
South Dakota SDA
Utah UTA
Washington WAS
Wyoming WYO
Costa Rica COS SOUTHERN AMERICA
El Salvador ELS
Guatemala GUA
Honduras HON

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Also published as 14 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Bromus breviaristatus Buckley
  • Bromus carinatus var. marginatus (Nees ex Steud.) Barkworth & Anderton
  • Bromus flodmanii Rydb.
  • Bromus hookeri var. marginatus (Nees ex Steud.) E.Fourn.
  • Bromus latior (Shear) Rydb.
  • Bromus marginatus var. breviaristatus (Buckley) Beetle
  • Bromus marginatus var. latior Shear
  • Bromus marginatus var. seminudus Shear
  • Bromus parviflorus A.Gray
  • Bromus pauciflorus Shear
  • Bromus proximus Shear
  • Bromus sitchensis var. marginatus (Nees ex Steud.) B.Boivin
  • Ceratochloa marginata (Nees ex Steud.) W.A.Weber
  • Forasaccus marginatus (Steud.) Lunell

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
  3. Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.
  4. Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.