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Bromus inermis Leyss.
Poaceae (Grass Family)
USDA Symbol: BRIN2
A rhizomatous, clump-forming, perennial grass bearing many light green (sometimes purple- or bronze-tinged), narrow, usually hairless spikelets in a loose, much-branched terminal cluster.
This drought-resistant Eurasian species was deliberately introduced into the United States around 1880 as a hay and pasture grass and for reseeding western ranges. It has since gone wild throughout the United States and much of Canada (except the far north) and is now one of our most common weedy grasses; in some areas it is considered an undesirable plant because of its aggressiveness. However, its deep roots make it an excellent soil binder, protecting against erosion. Relished by all kinds of livestock, it is a fine forage. The species name means unarmed, alluding to the spikelets, which do not have the long bristles characteristic of some of Smooth Bromes relatives. A rare variant has hairy spikelets.
Bloom InformationBloom Color: Yellow
Bloom Time: May , Jun , Jul
, WY Canada: AB
, YT Native Distribution:
Throughout most of North America, except parts of far north; least common in southeastern United States. Native Habitat:
Roadsides, fields, pastures, nursery plots, and waste places.
Growing ConditionsWater Use: Medium
Light Requirement: Sun
CaCO3 Tolerance: Low
Butterflies and Moths of North America (BAMONA)
is a larval host and/or nectar source for:
National Wetland Indicator Status
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1
(Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here
for map of regions.
From the National Organizations Directory
According to the species list provided by Affiliate Organizations, this plant is either on display or available from the following:
Native Seed Network
- Corvallis, OR
Record Last Modified: 2008-10-01
Research By: TWC Staff