Plant Image
Plant - summer
Sedona area
ML
Yavapai County Native & Naturalized Plants


Poa pratensis - Kentucky bluegrass

Plant Form:Grass

Family: Poaceae


   
 
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Plant image
Seedhead
Foxboro Lake
ML
Plant image
Seedhead
Sedona area
ML
  Grass Description -   Glossary of Grass Terminology

Origin: Introduced    Season: Cool
Habitat Description: Naturalized in pastures, prairies, roadsides, open woods, and waste ground.
Plant Communities: Interior Chaparral, Semidesert Grasslands, Pinyon Juniper Woodland, Montane Conifer Forest, Riparian
Elevation: Not determined

General Description

Desc: Found mostly in the shade of trees or directly under the protection of trees and shrubs. Leaves have keel shaped tips. A low- growing sodgrass spreading from underground rootstocks. The erect flowering stems are 1 to 3 feet tall, numerous and slender.
Grass Type: Perennial bunchgrass  Rhizomes: Y  Stolons: N
Leaf Arrangement: Leaves basal and erect  Large Dense Clump (> 2 feet): N  Bushy (highly branched): N
Height with Seedheads: 24 to 36 inches
Seedhead Structure: Branched - open and spreading  Seedhead Droops: N
Flowering Period: Apr - Oct



Flower Characteristics

Number of Flowers per Spikelet: Multi-flowered  Spikelet Arrangement: End of branches
Awns: Absent   Three Awns: N  Awns Bent: N

Flower and Seedhead Notes: Pyramid-shaped, 1 to 4 inches long, open. Lowermost branches slender, spreading, usually five in a whorl. The individual florets have copious cobweb-like hairs at base, somewhat contracted after flowering. Spikelets 3 - 4 flowered.


Vegetative Characteristics

Blade Hairy: N  Blade with White Margin: N  Blade Cross Section: Flat or folded  
Blade Notes: Blades 3/8-4 inches long 0.4–4.5 mm wide, flat, folded, or rolled involute, lower surfaces smooth, without hairs, top surfaces smooth or sparsely roughened with stout projections, frequently sparsely hairy, hairs 0.2–0.8 mm, keel shaped tips.
Sheath Hairy: N  Tuft of Hairs Top of Sheath or Collar: N  Ligules: Membranous
Auricles (Ear-like lobes at base of blades): N
Vegetative Notes: Sheaths closed for 1/4–1/2 their length, smooth without hairs or infrequently sparsely to moderately hairy, bases of basal sheaths glabrous, not swollen. Ligules 0.9–2 mm, smooth or with roughened projections, truncate to rounded.

Forage Value: Good for livestock and elk, mule deer, and bighorn sheep in early spring and winter when few other plants are growing. Cottontail rabbit and wild turkey consume the leaves and seeds of Kentucky bluegrass.


  Arizona Cooperative Extension
Yavapai County
840 Rodeo Dr #C
Prescott, AZ 86305
(928) 445-6590
Version 3.1  
http://prescottnatives.com/SpeciesDetailGrass.php  
Last Updated: June 15, 2013  
Content Questions/Comments: Email Jeff Schalau  
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