Search Field Guide
Advanced Search
MT Gov Logo
Montana Field Guide

Montana Field Guides

Field Sowthistle - Sonchus arvensis
Other Names:  Perennial Sow-thistle, Perennial Sowthistle, Corn Sow Thistle, Gutweed, Swine Thistle, Tree Sow Thistle

Non-native Species

Global Rank: GNR
State Rank: SNA

Agency Status
MNPS Threat Rank:
C-value: 0

External Links

General Description
Rhizomatous perennial. Stems erect, 30–140 cm, sometimes branched above. Leaves linear-oblanceolate, pinnately lobed, 4–30 cm long, winged-petiolate below to sessile and auriculate above. Involucres 1–2 cm high; phyllaries glabrous or rarely stipitate-glandular. Ray ligules 7–13 mm long. Achenes brown, 2–4 mm long, minutely bumpy (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

We have subspecies arvensis and uliginosus (M.Bieb.) Nyman.

Species Range
Montana Range


Range Comments
Introduced; across most of North America.

Observations in Montana Natural Heritage Program Database
Number of Observations: 151

(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)

Wet meadows, marshes, ditch banks, irrigated fields; plains, valleys (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).


  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Simanonok, M. 2018. Plant-pollinator network assembly after wildfire. Ph.D. Dissertation. Bozeman, MT: Montana State University. 123 p.
  • Web Search Engines for Articles on "Field Sowthistle"
Login Logout
Citation for data on this website:
Field Sowthistle — Sonchus arvensis.  Montana Field Guide.  .  Retrieved on , from