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Sporobolus airoides - alkali sacaton

Scientific Family
Poaceae
Synonyms
Agrostis airoides
Plant type
Grasses
Riparian
No

Grass Description

Origin
Native
Season
Warm

Alkaline or saline soils in meadows and valleys, sandy soils of desert foothills or roadsides, and dry gravely slopes.

Plant Community
Grasslands
Interior Chaparral
Pinyon Juniper Woodlands
Low elevation
2500
High elevation
6500

General Description

A robust bunchgrass, often with stems bent outward (decumbent) at the base; forms large, tough clumps; coarse, glossy roots, and culms(stems) which appear to be solid, especially near the base. Reproduction is by seeds and by tillers.

Large, tough clumps 1-1/2 to 3 feet tall, open inflorescences with pedicels(spikelet stems) less than 5mm long, upper glumes at least 2/3 as long as the florets, sheath apices smooth with a few scattered hairs.

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

Flower Characteristics

Flowers per Spikelet
One-flowered
Spikelets One-Sided
No
Awns
Absent
Three Awns
No
Awns bent
No
Flower and Seedhead Notes

Loose and open, with widely spreading branches, half or more of the height of the plant which is 20 to 40 inches tall. Lemms 1-nerved. Appears to be one-flowered, 2nd flower is infertile.

Vegetative Characteristics

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

Frequently minute salt crystal can be seen with a hands lens. Blades firm and fibrous, less than 1/16 inch wide, tapering to a fine tip, midrib is prominent.

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

Fair to good for large grazing animals, poor when dry.