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Montana Field Guide

Montana Field Guides

Bristly Bristle Grass - Setaria verticillata
Other Names:  Hooked Bristlegrass, Rough Bristle-grass, Bristly Foxtail, Setaria verticilliformis

Non-native Species

Global Rank: GNR
State Rank: SNA

Agency Status
MNPS Threat Rank:
C-value: 1

External Links

General Description
Stems 10–50 cm. Leaves: blades 5–12 mm wide; sheaths usually hairy at throat; ligule 1–1.5 mm long. Inflorescence an erect to nodding spike-like panicle 5–13 cm long, sterile bristles 4–7 mm long, retrorsely barbed. Spikelets 2–2.5 mm long. Lemmas reticulately veined but not conspicuously transversely corrugated (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range

Range Comments
Introduced throughout North America excepting the very southeast (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 15

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



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



  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Brey, C.W. 1998. Epidemiology of wheat curl mite (Aceria tosichella K.) and wheat streak mosaic virus on feral grass species and effect of glyphosate on wheat curl mite dispersal. Ph.D. Dissertation. Bozeman, MT: Montana State University. 136 p.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
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Citation for data on this website:
Bristly Bristle Grass — Setaria verticillata.  Montana Field Guide.  .  Retrieved on , from