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Field Sowthistle - Sonchus arvensis
Other Names:
Perennial Sow-thistle, Perennial Sowthistle, Corn Sow Thistle, Gutweed, Swine Thistle, Tree Sow Thistle
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 et al. 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 Descriptions
Non-native
Range Comments
Introduced; across most of North America.
Observations in Montana Natural Heritage Program Database
Number of Observations: 207
(Click on the following maps and charts to see full sized version)
Map Help and Descriptions
Relative Density
Recency
(Observations spanning multiple months or years are excluded from time charts)
Habitat
Ecology
POLLINATORS The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap:
Bombus vagans,
Bombus bifarius,
Bombus fervidus, and
Bombus terricola (Thorp et al. 1983, Colla and Dumesh 2010).
Management
References
- 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.
- Thorp, R.W., D.S. Horning, and L.L. Dunning. 1983. Bumble bees and cuckoo bumble bees of California (Hymenoptera: Apidae). Bulletin of the California Insect Survey 23:1-79.
- Additional ReferencesLegend: View Online Publication
Do you know of a citation we're missing?- 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.
- Simanonok, M. 2018. Plant-pollinator network assembly after wildfire. Ph.D. Dissertation. Bozeman, MT: Montana State University. 123 p.
- Simanonok, M.P. and L.A. Burkle. 2019. Nesting success of wood-cavity-nesting bees declines with increasing time since wildfire. Ecology and Evolution 9:12436-12445.
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