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Montana Field Guide

Montana Field Guides

Common Bugle - Ajuga reptans
Other Names:  Carpet-bugle, Carpet Bugleweed, Creeping Bugleweed, Carpetweed

Non-native Species

Global Rank: GNR
State Rank: SNA
C-value: 1

Agency Status


External Links

General Description
Fibrous-rooted perennial, forming loose mats of stolons. Stems erect, 10–30 cm, mostly simple, pubescent. Leaves petiolate, becoming sessile above; blades obovate, crenate, 2–10 cm long, glabrate. Inflorescence crowded; verticillasters in axils of upper leaves and bracts. Flowers: calyx villous, 4–5 mm long, the equal lobes just shorter than the tube; corolla blue, 9–15 mm long, the upper lip inconspicuous, middle lobe of lower lip large and bifid; stamens 4, exserted; style branches short, subequal (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
In Flathead County; an introduced ornamental, escaped sporadically throughout North America but native to Europe (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 1

(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)


The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap: Bombus fervidus (Colla and Dumesh 2010).


  • Literature Cited AboveLegend:   View Online Publication
    • Colla, S.R. and S. Dumesh. 2010. The bumble bees of southern Ontario: notes on natural history and distribution. Journal of the Entomological Society of Ontario 141: 39-68.
    • 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:
Common Bugle — Ajuga reptans.  Montana Field Guide.  .  Retrieved on , from