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Sorghastrum nutans - Indiangrass

Scientific Family
Poaceae
Synonyms
Andropogon nutans, Sorghastrum avenaceum
Plant type
Grasses
Riparian
Yes

Grass Description

Origin
Native
Season
Warm

Dry slopes to moist canyons, wide range of habitats, pine forests at medium altitudes, prairies to woodlands, savannahs, and scrubland vegetation, infrequent in Arizona. Moderately salt tolerant. Often found in areas of adequate moisture.

Plant Community
Desert Scrub
Interior Chaparral
Montane Conifer Forest
Pinyon Juniper Woodlands
Riparian
Grasslands
Low elevation
2500
High elevation
6500

General Description

Slender, tall and rhizomatous perennial; erect slender seedhead stems emerge from short, stout and scaly rhizomes; seedhead is often golden.

Tall, robust perennial, stout, scaly rhizomes; leaves long and flat; ligules and collar are hairy; thick, pointed auricles; seedhead yellowish with gray branches; spikelets paired, one sterile and stemmed, one fertile and sessile with twisted bent awns.

Grass type
Perennial bunchgrass
Rhizomes
Yes
Stolons
No
Clump Diameter 2 ft or more
No
Bushy - highly branched
No
Height with Seedheads
Greater than 36 inches
Seedhead Structure
Branched - open and spreading
Seedhead droops
No
First bloom month
July
Last bloom month
October

Flower Characteristics

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

Much-branched seedhead that contracts at maturity, yellowish or tawny. Fertile lemma with a twisted, once or twice-bent awn 1/2 to 1 inch long.

Vegetative Characteristics

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

Blades up to 28 inches long, to 1/4 inch wide, usually smooth, midvein conspicuous on back of leaf.

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

Excellent, palatable to cattle and horses, does not cure well, only moderately palatable after maturity and fair winter forage.