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Seeds are 0.09 to 0.2 inch (2.4-5 mm) long, and 0.04 inch (1 mm) in diameter with a pappus of feathery bristles [42,75,176,238,240].","source_section":"Cirsium arvense, Canada thistle / Botanical Description","source_sha256":"635189a74341da6f0c9361426a4ec394e6ebefcbbaef300917d19d7fd22a8013","source_title":"Fire Effects Information System: Cirsium arvense","source_url":"https://research.fs.usda.gov/feis/species-reviews/cirarv"}],"values":{"height_description":"1 to 6.5 feet (0.3-2 m) tall"}},"minnesota_wildflowers":{"matched_name":"Cirsium arvense","retrieved":"2026-10-04T02:32:42.685291+00:00","scope":{"kind":"unspecified"},"scope_note":"Source-reported species characteristics; not a location-specific estimate.","source_label":"Minnesota Wildflowers","source_sha256":"45bf67455caad7e8d6184a37d2c8c8c38a59beba94f356c15bf3db29e477dc4a","source_url":"https://www.minnesotawildflowers.info/flower/canada-thistle","trait_evidence":[{"expected_source_name":"Cirsium arvense","field":"height_description","original_field":"height","record_id":"trait:0fc922a5dd903faa628c715594890b976cad49568742755fe0008b6a1dd19e13","retrieved_at":"2026-10-04T02:32:42.685291+00:00","scope":{"kind":"unspecified"},"scope_note":"Species profile; 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distribution and native-status discovery filters do not establish local growing or bloom timing.","source":"ncsu","source_name":"Cirsium arvense","source_sha256":"353eabd98dc7a84acbda5ebec1af9d165900572faa7294a1a51cb807009f82bc","source_url":"https://plants.ces.ncsu.edu/plants/cirsium-arvense/","status":"eligible_fact","taxon_id":"taxon:76c67006-4263-5b3c-9a66-acdb1062a805","value":["4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b"]}],"values":{"flower_color":["Pink","Purple/Lavender","White"],"hardiness_zones":["4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b"],"life_cycle":["Perennial"],"light":["Full sun (6 or more hours of direct sunlight a day)","Partial Shade (Direct sunlight only part of the day, 2-6 hours)"],"moisture_categories":["Moist","Occasionally Dry","Occasionally Wet","Very Dry"],"soil_ph_categories":["Alkaline (>8.0)","Neutral (6.0-8.0)"]}}},"light_range":["part shade","full sun"],"light_source":"NC Extension Plant Toolbox","native_synthesis":{"claims":[{"claim":"introduced","flag":"I","matched_name":"Cirsium arvense","scope":"VA","source":"va_atlas","url":"https://vaplantatlas.org/index.php?do=plant&plant=260"},{"claim":"introduced","scope":"VA","source":"va_invasive","url":"https://dcr.am.virginia.gov/natural-heritage/document/nh-invasive-plant-list-2024.pdf"},{"claim":"introduced","matched_name":"Cirsium arvense","scope":"L48","source":"usda","text":"AK:I CAN:I GL:I L48:I SPM:I","url":"https://plants.usda.gov/"},{"basis":"range text names a native range outside North America","claim":"introduced","scope":"NC-SC-GA","source":"floraquest_carolinas_georgia","text":"Native of Eurasia.","url":"https://play.google.com/store/apps/details?id=com.emountainworks.android.southeastfieldguide"},{"basis":"range text names a native range outside North America","claim":"introduced","scope":"DC-DE-IL-IN-KY-MD-NJ-NY-OH-PA-VA-WV","source":"floraquest_northern_tier","text":"Native of Eurasia.","url":"https://play.google.com/store/apps/details?id=com.emountainworks.android.midatlanticfieldguide"},{"basis":"NatureServe subnational native or exotic flag for this state","claim":"introduced","matched_name":"Cirsium arvense","scope":"VA","source":"natureserve_explorer","srank":"SNA","url":"https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.154063/Cirsium_arvense"}],"county_native_range":"unresolved","decided_by":"va_invasive","explanation":"Virginia DCR invasive plant list (government agency, state claim) gives the value. Speaks for its own area (GA-NC-SC), not this state: FloraQuest: Carolinas, Georgia (Weakley).","label":"Not native to Virginia","provenance":{"flags":[],"source":"va_invasive","specificity":"state","tier":"government"},"rule":"fact-hierarchy-2","status":"not_native"},"source_name":"Cirsium arvense","taxon_id":"taxon:76c67006-4263-5b3c-9a66-acdb1062a805","revision":"publish:903368a2-17ec-496c-89d2-a217f30d9dda","photos":[{"id":"inat-178220769","src":"/api/photos/image/a5fdf97a27a8b7c8f0f4d872177f1e26c3133236be8a2a8f318080d6dd83568d.jpg","view":"bloom","alt":"Cirsium arvense — bloom photograph","width":500,"height":335,"artist":"(c) Douglas Goldman, some rights reserved (CC BY-SA)","license":"CC BY-SA 4.0","license_url":"https://creativecommons.org/licenses/by-sa/4.0/","source_url":"https://www.inaturalist.org/photos/178220769","changes":"iNaturalist medium image; no additional crop, retouching, or re-encoding.","kind":"photo"}]}