Arizona Range Grasses
Their Description, Forage Value, and Grazing Management
Cooperative Extension,College of Agriculture & Life Sciences, The University of Arizona

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Needle and Thread Grass
Stipa comata Trin. & Rupr


Description

Growth habit: A relatively large, perennial bunchgrass, needle and thread is often the tallest grass present and can reach height of over 3 feet.
Color: Light green to green and grey green when mature.
Leaves: Blades are up to 17 inches long and mostly smooth with prominently veined sheaths.
Inflorescence: Panicle with 1-flowered spikelets. Lemma with 4 to 20 inch long awn.
Season: Cool Season
Origin: Native

Figure 70.—Needle and Thread Grass (Stipa comata), plant, glumes, and floret.

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Occurrence

Apache County to Yavapai and eastern Mohave County and south Pima County. The grass can be found as low as 2,000 feet up to ponderosa pine sites above 8,500 feet.

Forage Value

The grass provides good to excellent forage when it is actively growing in the spring. After seed set, the long awns reduce its palatability to large grazing animals.


Grazing Management

Needle and thread grass is commonly grazed in the spring and is often one of the first grasses to provide green forage. Because of this it can be selectively grazed and heavily used. Occasional spring deferment may benefit this species.


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Document located http://cals.arizona.edu/pubs/natresources/az1272/
published
2002
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