Avenasativa
Plant Image
Spikelets
Patrick Alexander @http://swbiodiversity.org
Yavapai County Native & Naturalized Plants


Avena sativa - common oat

Plant Form:Grass

Family: Poaceae


   
 
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Blades

Patrick Alexander @http://swbiodiversity.org
Plant image
Seedheads

Max Licher @http://swbiodiversity.org
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Plant

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

Origin: Introduced    Season: Cool and Warm
Habitat Description: Dry wasteland, especially on heavier soils. Roadsides, fields, railroads, and other disturbed places.
Plant Communities: Disturbed Areas
Elevation: 1000 - 7500 feet

Similar Species: A. fatua

General Description

Desc: Oats have a fibrous root system. Stems are erect, smooth, and hollow. The leaves are narrow. The primary seedhead branches are drooping. The spikelets (clustered units of flowers and bracts) are solitary and pendulous.
Identification notes: Spikelets are mostly 2-flowered, lemma awns are straight and not twisted, often reduced; lemmas are glabrous while the lemmas of A. fatua are long-hairy on their back; florets do not easily fall from the glumes.
Grass Type: Annual  Rhizomes: N  Stolons: N
Large Dense Clump (> 2 feet): N  Bushy (highly branched): N
Height with Seedheads: Greater than 36 inches
Seedhead Structure: Branched - open and spreading  Seedhead Droops: Y
Flowering Period: Jun - Jul



Flower Characteristics

Number of Flowers per Spikelet: Multi-flowered  Spikelets One-sided: N
Awns: Less than 1/4 inch   Three Awns: N  Awns Bent: N

Flower and Seedhead Notes: The seedhead is open, pyramidal, loosely spreading, nodding, 7 to 15 inches long and 2 to 6 inches wide. Spikelets have 2 or 3 wedge-shaped fertile florets, overlapping glumes; attach to main seedhead by thin stems and stay on the seedhead at maturity.


Vegetative Characteristics

Blade Hairy: N  Blade with White Margin: N  Blade Cross Section: Flat  
Blade Notes: Leaves are cauline (arise from the upper part of the stem). Leaf-blades are 5 to 15 inches long and less than 1/2 inch wide. The leaf-blade surface is minutely rough-textured on both sides. The tip of the leaf-blade tapers to a point.
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:

Forage Value: Oats are high in protein, carbohydrates and fiber. Both the grain and fodder are utilized by grazing animals. The forage yield and forage feeding value of the harvested crop change as the oat plant matures through its growth stages.


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