Page author: Don Knoke
Avena barbata
barbed oat
WTU images
WTU specimens
Other herbaria

Distribution: Introduced and common in southwest United States; occasional in Washington and western Oregon.

Habitat: Roadsides and waste land.

Flowers: May - June

Origin: Introduced

Conservation Status: Not of concern

Description:
General:

Annuals up to 1 m. tall, the culms hollow, glabrous or with a few long hairs.

Leaves:

Sheath open; ligules 2-4 mm. long, puberulent, obtuse; blades 3-6 mm. broad, scabrous, flat.

Flowers:

Inflorescence a large, open panicle, the spikelets pendulous; spikelets 2- or 3-flowered; glumes 2.2-2.5 cm. long, exceeding the upper floret, membranous, the first 7-nerved, the second 9-nerved; lemmas with stiff, reddish hairs on the lower half, split at the tip into 2 pointed teeth; paleas shorter than the lemmas; rachilla prolonged behind the upper floret; lodicules 2 mm. long.

Fruits:

Utricle

Accepted Name:
Avena barbata Pott ex Link
Publication: J. Bot. (Schrader) 1799(2,2): 314-315 [1800]. 1799.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Avena barbata in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Avena barbata checklist entry.

E-Flora BC: Avena barbata atlas page.

CalPhotos: Avena barbata photos.

USDA Plants: Avena barbata information.

11 photographs:
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