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Bothriochloa laguroides - silver beardgrass

Scientific Family
Poaceae
Synonyms
Andropogon laguriformis, A. laguroides, A. tenuirachis, Bothriochloa saccharoides var. laguroides
Other common names
silver bluestem
Plant type
Grasses
Riparian
No

Grass Description

Origin
Native
Season
Warm

Open dry sandy soils of grasslands, prairies, river bottoms and woodlands. Also found on rocky limestone slopes and in disturbed areas.

Plant Community
Desert Scrub
Disturbed Areas
Interior Chaparral
Pinyon Juniper Woodlands
Grasslands
Low elevation
3000
High elevation
6000
Similar species
Bothriochloa barbinodis

General Description

Clumping grass with silky flower puffs on vertical stems. Foliage of this plant is 12 to 18 inches high and the erect flower spike grows 2 to 3 feet above the foliage. As fall progresses, the leaves change in color to red, purple or burnt orange.

Seedheads are up to 5 inches long; spikelets are rounded and awned, stemmed or sessile, sessile ones are subtended by silvery-white or light tan hairs that obscure the spikelets; leaves are often clustered at the base of the plant.

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 - contracted
Seedhead droops
No
First bloom month
June
Last bloom month
October

Flower Characteristics

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

Seedheads are borne on ascending, usually straight branches and have a silvery white coloration. Spikelets have 2 florets; only one is bisexual and fertile. Awns are spirally twisted and bent near the base.

Vegetative Characteristics

Blade is hairy
No
Blade margins white
No
Blade cross-section
Flat
Folded

Leaf blades flat or sometimes folded, the midvein thickened, and smooth or sparsely hairy at the base. Leaf sheath is smooth, mostly open and loose. Leaf blades are covered with a waxy bluish-green or gray coating and sometimes also have white glands.

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

Fair forage value for livestock and wildlife. It is usually only grazed in its early growth stage.