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- Max Licher @, Usage Rights: Creative Commons Attribution-ShareAlike (CC BY-SA)

Yavapai County Native & Naturalized Plants

Bromus marginatus - mountain brome

Synonyms: Bromus breviaristatus, Bromus carinatus, Bromus sitchensis, Ceratochloa marginata
Plant Form: Grass

Family: Poaceae

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Max Licher @, Usage Rights: Creative Commons Attribution-ShareAlike (CC BY-SA)
Max Licher @, Usage Rights: Creative Commons Attribution-ShareAlike (CC BY-SA)
  Grass Description -   Glossary of Grass Terminology

Origin: Native    Season: Cool
Habitat Description: Dry open slopes; scrublands; woodland and forest openings. Moist woodlands and rocky slopes.
Plant Communities:Desert Scrub, Interior Chaparral, Semidesert Grasslands, Pinyon Juniper Woodland, Montane Conifer Forest, Riparian
Elevation: 3200 - 9500 feet

General Description

Desc: Erect, loosely tufted, 2 to 4 feet tall, rhizomes absent.
Identification Notes: 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: N  Stolons: N
Large Dense Clump (> 2 feet): N  Bushy (highly branched): N
Height with Seedheads: Greater than 36 inches
Seedhead Structure: Branched - open and spreading  Seedhead Droops: Y
Flowering Period: Mar - Jun
Flower Characteristics

Number of Flowers per Spikelet: Multi-flowered  Spikelets One-sided: N
Awns: Less than 1/4 inch   Three Awns: N  Awns Bent: N
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 Charcteristics

Blade Hairy: Y    Blade with White Margins: N    Blade Cross section: Flat or involute
Blade Notes: 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 Hairy: Y    Tuft of Hairs at top of Sheath or Collar: Y    Ligules: Membranous
Auricles (Ear-like lobes at collar area: N

Forage Value: Important forage grass for domestic livestock, elk and deer.

  Arizona Cooperative Extension
Yavapai County
840 Rodeo Dr #C
Prescott, AZ 86305
(928) 445-6590
Version 8.0  
Last Updated: Dec 13, 2022
Content Questions/Comments: Email Matt Halldorson  
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