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Grass Gallery

Poaceae, Pooideae, Aveneae - Oats

(Family, Subfamily, Tribe)

Waves of Grain Index - Grass

tribe Aveneae

Common Oats (Cultivated Oats) Avena sativa (Avena fatua var. sativa)

Drooping heads are about 1/2" long.  Short grass at base.  Disease and frost tolerant.

Photos taken in Taylor County, Texas, June 2004

(Cultivated, Introduced from Europe - Callahan, Brown)

Base: Annual, no rhizomes, no stolons (runner stem)

Blade (leaf): 5-12mm wide, basal

Culm (main grain stem): thick, succulent, glabrous 30-120cm tall

Inflorescence: 8-30 thin drooping branches each with one spikelet, pedicels can be curved or kinked

Spikelet: 2 florets

Glume: large, broad, glabrous, 7-9 nerved that don't extend to the margins or tip

Lemma: 1.5-2cm long, glabrous, awn short or absent

tribe Aveneae

**zg 4** Scientific name

Not sure what this is.  Spikelets 1/2"-3/4" long.  Nodes rough.

Photos taken in Taylor County, Texas, July 2007

(Native of ?)

Other Species In My Area

Wild Oats (Flaxgrass, Wheat Oats) Avena fatua

Very similar to Avena sativa except for the number of florets and hairy awned lemma.  Tends to be a host to diseases that can spread to cultivated oats and annual ryegrass.

(Introduced from Europe - Brown)

Base: Annual, no rhizomes, no stolons (runner stem)

Blade (leaf): 5-12mm wide, basal

Culm (main grain stem): thick, succulent, glabrous 30-120cm tall

Inflorescence: 8-30 thin drooping branches each with one spikelet, pedicels can be curved or kinked

Spikelet: 3-4 florets

Glume: large, broad, glabrous, 7-9 nerves that don't extend to the margins or tip

Lemma: 1.5-2cm long, awn 2.5-4cm long, reddish brown hairs on surface

Waves of Grain Index - Grass

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