Plant Image
Herbarium specimen
Yavapai County Native & Naturalized Plants


Aristida divaricata - poverty threeawn

Plant Form:Grass

Family: Poaceae


   
 
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Plant image
Spikelets

ASU Vascular Plant Herbarium
Usage Rights: CC BY-NC (Attribution-Non-Commercial)
  Grass Description -   Glossary of Grass Terminology

Origin: Native    Season: Warm
Habitat Description: Dry, open slopes or woodlands.
Plant Communities: Interior Chaparral, Semidesert Grasslands, Pinyon Juniper Woodland, Montane Conifer Forest
Elevation: 4000 - 7000 feet

Similar Species: Aristida barbata

General Description

Desc: Forms clumps of unbranched stems. Leaves are mostly basal and roll along the edges. The seed has a twisted tip and three awns.
Identification notes: Tufted perennial grass with open branched seedheads spreading at the base, branchlets appressed; lateral awn branches more than 1/16 inch long, usually nearly as long as the central one; basal portion of awn spirally twisted; collars densely hairy.
Grass Type: Perennial bunchgrass  Rhizomes: N  Stolons: N
Large Dense Clump (> 2 feet): N  Bushy (highly branched): N
Height with Seedheads: 12 to 24 inches
Seedhead Structure: Branched - open and spreading  Seedhead Droops: N
Flowering Period: Jul - Oct



Flower Characteristics

Number of Flowers per Spikelet: One-flowered  Spikelets One-sided: N
Awns: 1/4 inch to 1 inch   Three Awns: Y  Awns Bent: Y

Flower and Seedhead Notes: Very open, spreading branches extend at right angles from the central axis. Each spikelet bears three spreading, hairlike awns at its tip; 1/2 to 3/4 inch, not disarticulating (separating) at maturity.


Vegetative Characteristics

Blade Hairy: N  Blade with White Margin: N  Blade Cross Section: Flat or involute  
Blade Notes: Blades 2 to 8 inches long, 1/16 inch wide, flat to loosely involute, smooth.
Sheath Hairy: N  Tuft of Hairs Top of Sheath or Collar: Y  Ligules: Hairy
Auricles (Ear-like lobes at base of blades): N
Vegetative Notes: Sheaths longer than the internodes, free from hair except at the summit; collars densely covered with soft hairs; ligules to 1/16 inch.

Forage Value: Fair to poor.


  Arizona Cooperative Extension
Yavapai County
840 Rodeo Dr #C
Prescott, AZ 86305
(928) 445-6590
Version 7.0  
http://cals.arizona.edu/yavapaiplants/SpeciesDetailGrass.php  
Last Updated: May 10, 2017  
Content Questions/Comments: Email Jeff Schalau  
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