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Plant - summer
Mint Wash - Tr 345
Sue Smith
Yavapai County Native & Naturalized Plants

Bromus diandrus - ripgut brome

Synonyms: Anisantha diandra, A. gussonii, Bromus diandrus var. gussonei,  B. gussonii, B. rigidus subsp. gussonei and more. See SEINET.

Other Common Names: ripgut grass

Plant Form:Grass

Family: Poaceae

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Plants - spring

Mint Wash - Tr 345 Sue Smith
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Plant - summer

Mint Wash - Tr 345 Sue Smith
Plant image
Plants - spring

Mint Wash - Tr 345 Sue Smith
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Roots & blades

Mint Wash - Tr 345 Sue Smith
Plant image

Mint Wash - Tr 345 Sue Smith
Plant image

Mint Wash - Tr 345 Sue Smith
  Grass Description -   Glossary of Grass Terminology

Origin: Introduced    Season: Cool
Habitat Description: Grows in disturbed ground, waste places, fields, sand dunes, and roadsides.
Plant Communities: Disturbed Areas
Elevation: 1000 - 6600 feet

General Description

Desc: Erect or bending annual, 8 to 35 inches tall, height depends on moisture. Seedhead with long awns.
Identification notes: Weedy annual plants; sheaths hairy; no auricles; ligules 1/16 inch; seedhead open with spreading branches; spikelets cylindrical; awns 1-1/2 to 2 inches long, not twisted; narrow lemmas with two teeth up to ¼ inch long point.
Grass Type: Annual  Rhizomes: N  Stolons: N
Large Dense Clump (> 2 feet): N  Bushy (highly branched): N
Height with Seedheads: 24 to 36 inches
Seedhead Structure: Branched - open and spreading  Seedhead Droops: Y
Flowering Period: Apr - Jul

Flower Characteristics

Number of Flowers per Spikelet: Multi-flowered  Spikelets One-sided: N
Awns: Greater than 1 inch   Three Awns: N  Awns Bent: N

Flower and Seedhead Notes: Seedhead is open, drooping, 3 to 6 inches long, lower branches are shorter, 3/8 to 3/4 inches long. Spikelets of 5 to 7 florets. Lemmas may be hairy. Awns long and strong.

Vegetative Characteristics

Blade Hairy: Y  Blade with White Margin: N  Blade Cross Section: Flat or involute  
Blade Notes: Blades hairy and flat on both sides, 4 to 8 inches long, 1/8 to 1/2 inch wide. Edges of blade roll inward when dry.
Sheath Hairy: Y  Tuft of Hairs Top of Sheath or Collar: N  Ligules: Membranous
Auricles (Ear-like lobes at base of blades): N
Vegetative Notes: Sheaths soft-hairy, often with directed back, downward or spreading hairs. Ligules <1/8 inch, blunt or rounded, usually making an angle of more than 90 degrees, appear to be torn at the edge or irregularly cleft or notched, looks gnawed.

Forage Value: Excellent in seedling stage and during vigorous vegetative growth, but poor to fair upon flowering and poor when mature. The name ripgut brome suggests possible damage to animals if they consume the sharp, long-awned florets of this species.

  Arizona Cooperative Extension
Yavapai County
840 Rodeo Dr #C
Prescott, AZ 86305
(928) 445-6590
Version 8.0  
Last Updated: Feb 16, 2020  
Content Questions/Comments: Email Jeff Schalau  
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