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Montana Field Guide

Montana Field Guides

Slender Oat - Avena barbata

Exotic Species (not native to Montana)

Global Rank: GNR
State Rank: SNA

Agency Status
MNPS Threat Rank:
C-value: 1

External Links

General Description
Cultivated annual bunchgrass. Stems 35–180 cm. Leaves: blades 3–14(-25) mm wide. Inflorescence an open nodding panicle 6–40 cm long. Spikelets (18-)25-32 mm long, with 1-2 florets. Lemmas glabrous to sparsely strigose, awnless or with a weakly twisted awn arising from the middle 1/3 of the lemma 15-30 mm long, with an glabrous callus (adapted from: Baum, 2007, in Flora N. America, Vol. 24).

Range Comments
Introduced; CA and OR to NV and AZ; one county record each for NM, MT (Rosebud) and AL (Kartesz in prep. 2012).

Summary of Observations Submitted for Montana
Number of Observations: 0

(Click on the following maps and charts to see full sized version) Map Help and Descriptions


(Observations spanning multiple months or years are excluded from time charts)

Mostly in cultivation or escaped in disturbed areas.

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Citation for data on this website:
Slender Oat — Avena barbata.  Montana Field Guide.  .  Retrieved on , from