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Montana Field Guide

Montana Field Guides

Corn Speedwell - Veronica arvensis
Other Names:  Wall Speedwell, Rock Speedwell

Non-native Species

Global Rank: GNR
State Rank: SNA
C-value: 0

Agency Status


External Links

General Description
Annual. Stems prostrate to erect, simple or branched, 5–25 cm. Herbage puberulent to glandular-pubescent. Leaves short-petiolate; blades 5–12 mm long, ovate, crenate to deeply serrate. Inflorescence a terminal, glandular-pubescent to hirsute raceme; pedicels ca. 1 mm long. Flowers: calyx 2–3 mm long; sepals unequal; corolla deep blue, 2–4 mm across; style ca. 0.5 mm long. Capsule obcordate, deeply notched, 2–4 mm high, sparsely glandular-villous (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Montana Range Range Descriptions


Range Comments
Introduced to temperate North America; native to Eurasia (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 24

(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 vagans and Bombus pensylvanicus (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.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Clark, D. 1991. The effect of fire on Yellowstone ecosystem seed banks. M.Sc. Thesis. Montana State University, Bozeman. 115 pp.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
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Citation for data on this website:
Corn Speedwell — Veronica arvensis.  Montana Field Guide.  .  Retrieved on , from