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Bouteloua gracilis - blue grama

Scientific Family
Poaceae
Synonyms
Bouteloua oligostachya, Chondrosum gracile, Chondrosum oligostachyum
Other common names
eyelash grass
Plant type
Grasses
Riparian
No

Grass Description

Origin
Native
Season
Warm

Open rocky slopes, plains, forest openings, and mountain meadows.

Plant Community
Interior Chaparral
Montane Conifer Forest
Pinyon Juniper Woodlands
Grasslands
Low elevation
4000
High elevation
8000
Similar species
Bouteloua hirsuta

General Description

Densely tufted bunchgrass, semi-sod or ring forming, sometimes has rhizomes. Leaves mostly basal and short. Seedheads erect ending in 1 to 3 comb-like branches of spikelets. Older clumps may die in center leaving a ring of active growth.

Tufted perennial, stems mostly erect. Leaves basal, mostly flat, curled when dry. Seedheads typically 2 branches of 80 one-sided spikelets of 1 bisexual with a hairy lemma and 1 rudimentary, branch tip not exceeding the spikelets. Glumes do not fall.

Grass type
Perennial bunchgrass
Rhizomes
Yes
Stolons
No
Clump Diameter 2 ft or more
No
Bushy - highly branched
No
Height with Seedheads
12 inches or more
Seedhead Structure
Branched - comblike
Seedhead droops
No
First bloom month
July
Last bloom month
October

Flower Characteristics

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

Seedheads typically bear 2 branches of spikelets, sometimes 3 or 4. Spikelets have 1 sterile floret and 1 fertile floret, with tufts of hair at the base of fertile floret. Central and lateral awns <1/4 inch, glumes hairy on midvein, do not fall with seed.

Vegetative Characteristics

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

Blades 2 to 10 inches long, 1/8 to 1/4 inch wide, flat to involute and curled at maturity, hairs usually present basally.

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

Good forage value for livestock and wildlife, retains its palatability when mature or during dry periods.