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Max Licher @http://swbiodiversity.org
Yavapai County Native & Naturalized Plants

Poa bigelovii - Bigelow's bluegrass

Plant Form:Grass

Family: Poaceae

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Patrick Alexander @http://swbiodiversity.org
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Liz Makings @http://swbiodiversity.org
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Patrick Alexander @http://swbiodiversity.org
  Grass Description -   Glossary of Grass Terminology

Origin: Native    Season: Cool
Habitat Description: Rocky slopes and dry sandy washes.
Plant Communities: Desert Scrub, Interior Chaparral, Semidesert Grasslands, Pinyon Juniper Woodland
Elevation: 1000 - 6000 feet

General Description

Desc: Annual with erect stems, growing in dense tufts.
Identification notes: Seedhead is contracted, branches are erect and appressed or only slightly spreading. Flat smooth leaves have median lines and boat-shaped tips. Glumes are smooth. Florets have basal tufts of dense cottony or web-like hairs.
Grass Type: Annual  Rhizomes: N  Stolons: N
Large Dense Clump (> 2 feet): N  Bushy (highly branched): N
Height with Seedheads: 12 to 24 inches
Seedhead Structure: Branched - contracted  Seedhead Droops: N
Flowering Period: Mar - May

Flower Characteristics

Number of Flowers per Spikelet: Multi-flowered  Spikelets One-sided: N
Awns: Absent   Three Awns: N  Awns Bent: N

Flower and Seedhead Notes: Seedhead is 2 to 6 inches long and is a compact series of hairy spikelets. Spikelets are broadly oval with 3 to 8 florets overlapping and compressed against each other, spreading apart at maturity. Spikelets have a dense cottony tuft at the base.

Vegetative Characteristics

Blade Hairy: N  Blade with White Margin: N  Blade Cross Section: Flat  
Blade Notes: Blades are flat; 3/4 to 1-1/2 inches wide and 1 to 5 inches long.
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 are open and slightly keeled at the bottom. Ligule is about 1/8 inch long and membranous with a tattered edge.

Forage Value: Highly palatable to livestock but usually not a significant source of forage.

  Arizona Cooperative Extension
Yavapai County
840 Rodeo Dr #C
Prescott, AZ 86305
(928) 445-6590
Version 8.0  
Last Updated: Feb 16, 2020  
Content Questions/Comments: Email Jeff Schalau  
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