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Bromus marginatus - mountain brome

Scientific Family
Poaceae
Synonyms
Bromus breviaristatus, Bromus carinatus, Bromus sitchensis, Ceratochloa marginata
Plant type
Grasses
Riparian
Yes

Grass Description

Origin
Native
Season
Cool

Dry open slopes; scrublands; woodland and forest openings. Moist woodlands and rocky slopes.

Plant Community
Desert Scrub
Grasslands
Interior Chaparral
Montane Conifer Forest
Pinyon Juniper Woodlands
Riparian
Low elevation
3200
High elevation
9500

General Description

Erect, loosely tufted, 2 to 4 feet tall, rhizomes absent.

Sheaths retrorsely (directed downward or backward) pilose (bearing long, soft, straight hairs); lemmas usually evenly pubescent (short, soft hairs) on the back. Seedhead with stiff, erect or ascending branches; awns usually less than 1/4 inch long.

Grass type
Perennial bunchgrass
Rhizomes
No
Stolons
No
Clump Diameter 2 ft or more
No
Bushy - highly branched
No
Height with Seedheads
Greater than 36 inches
Seedhead Structure
Branched - open and spreading
Seedhead droops
Yes
First bloom month
March
Last bloom month
June

Flower Characteristics

Flowers per Spikelet
Multi-flowered
Spikelets One-Sided
No
Awns
Less than 1/4 inch
Three Awns
No
Awns bent
No
Flower and Seedhead Notes

Seedhead erect and rather narrow to 8 inches long. Spikelets 1 to 2 inches long, 4 to 9 flowered, strongly laterally compressed. Glumes are unequal.

Vegetative Characteristics

Blade is hairy
Yes
Blade margins white
No
Blade cross-section
Flat
Involute – rolled inward on upper surface

Blades 1/8 to 5/16 inches wide, 3 to 10 inches long, can be without hairs, with sparse long soft straight hairs, or covered with short soft hairs, on 1 or both surfaces. Sheaths are closed for most of their length.

Sheath is hairy
Yes
Tufts of hair top of sheath or collar
Yes
Ligule
Membranous
Auricles
No

Important forage grass for domestic livestock, elk and deer.