Canada thistle
Cirsium arvense (L.) Scop.
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| Taxonomic Rank: Magnoliopsida > Asterales > Asteraceae > Cirsium |
| Common Name Synonym(s): Californian thistle, creeping thistle, field thistle |
| Taxonomic Synonym(s): Breea arvensis (L.) Scop. Breea incana (L.) Scop. Carduus arvensis (L.) Scop. Cirsium incanum (L.) Scop. Cirsium setosum (L.) Scop. Serratula arvensis (L.) Scop. |
| Category: Plants: Forbs/Herbs |
169 Records | View Images as Host | View Descriptions |
 0024019 Flower(s) Norman E. Rees |
 0024020 Research research site Norman E. Rees |
 0024021 Infestation Norman E. Rees |
 1196009 Infestation UAF Cooperative Extension Archive |
 1196010 Plant(s) UAF Cooperative Extension Archive |
 1196013 Flower(s) Michael Shephard |
 1196121 Plant(s) Jamie Nielsen |
 1196143 Infestation UAF Cooperative Extension Archive |
 1196252 Plant(s) UAF Cooperative Extension Archive |
 1196257 Infestation UAF Cooperative Extension Archive |
 1237095 Plant(s) Dan Tenaglia |
 1265114 Plant(s) Peggy Greb |
 1299209 Infestation Vince Belleci |
 1334019 Flower(s) South Dakota Chris Evans |
 1334020 Flower(s) South Dakota Chris Evans |
 1334022 Flower(s) In a forested setting. South Dakota Chris Evans |
 1358349 Flower(s) Mary Ellen (Mel) Harte |
 1358350 Plant(s) Mary Ellen (Mel) Harte |
 1358351 Flower(s) Mary Ellen (Mel) Harte |
 1358352 Foliage Mary Ellen (Mel) Harte |
 1358353 Feature(s) Stem and foliage Mary Ellen (Mel) Harte |
 1358354 Foliage Mary Ellen (Mel) Harte |
 1358355 Foliage Mary Ellen (Mel) Harte |
 1358356 Plant(s) Mary Ellen (Mel) Harte |
 1358357 Flower(s) Mary Ellen (Mel) Harte |
 1358358 Plant(s) Mary Ellen (Mel) Harte |
 1358359 Flower(s) Mary Ellen (Mel) Harte |
 1358360 Flower(s) Mary Ellen (Mel) Harte |
 1358361 Foliage Mary Ellen (Mel) Harte |
 1459222 Plant(s) Along railroad right-of-way Steve Dewey |
 1459754 Infestation In a pasture Steve Dewey |
 1459755 Foliage Steve Dewey |
 1459756 Flower(s) Steve Dewey |
 1459757 Infestation Steve Dewey |
 1459758 Flower(s) Steve Dewey |
 1459759 Infestation With white flowers Steve Dewey |
 1459760 Plant(s) Steve Dewey |
 1459761 Flower(s) Purple and (rare) white flowers in the same field Steve Dewey |
 1459762 Infestation Steve Dewey |
 1459763 Plant(s) With white flowers Steve Dewey |
 1459764 Flower(s) Steve Dewey |
 1459915 Flower(s) Steve Dewey |
 1551182 Infestation Ohio State Weed Lab Archive |
 1551183 Foliage Ohio State Weed Lab Archive |
 1551184 Seedling(s) Ohio State Weed Lab Archive |
 1551186 Feature(s) Ohio State Weed Lab Archive |
 1551187 Seed(s) Ken Chamberlain |
 1553261 Flower(s) Theodore Webster |
 1553262 Foliage basal rosette Ohio State Weed Lab Archive |
 1553263 Infestation fruiting Theodore Webster |
 1553264 Fruit(s) Ken Chamberlain |
 1553265 Foliage basal rosette Ohio State Weed Lab Archive |
 1553266 Seedling(s) Theodore Webster |
 1553267 Seedling(s) Ohio State Weed Lab Archive |
 1553268 Infestation in flower Ohio State Weed Lab Archive |
 1553269 Seedling(s) Ken Chamberlain |
 1553270 Seedling(s) Ohio State Weed Lab Archive |
 1560035 Seedling(s) Ohio State Weed Lab Archive |
 1560036 Flower(s) Ohio State Weed Lab Archive |
 1560037 Flower(s) Ohio State Weed Lab Archive |
 1560038 Flower(s) Ohio State Weed Lab Archive |
 1560039 Flower(s) Ohio State Weed Lab Archive |
 1560040 Flower(s) Ohio State Weed Lab Archive |
 1560041 Fruit(s) Ohio State Weed Lab Archive |
 1560042 Fruit(s) Ohio State Weed Lab Archive |
 1560043 Fruit(s) Ohio State Weed Lab Archive |
 1560044 Seedling(s) with cotyledons Ohio State Weed Lab Archive |
 1560045 Foliage Theodore Webster |
 1560046 Seedling(s) Ohio State Weed Lab Archive |
 1560047 Plant(s) in flower Ohio State Weed Lab Archive |
 1560048 Plant(s) in flower; view from above Ohio State Weed Lab Archive |
 1560050 Foliage Ohio State Weed Lab Archive |
 1560052 Seedling(s) Ohio State Weed Lab Archive |
 1560053 Seedling(s) Ohio State Weed Lab Archive |
 1560054 Seedling(s) Ohio State Weed Lab Archive |
 1560055 Seedling(s) with cotyledons Ohio State Weed Lab Archive |
 1560056 Seedling(s) Ohio State Weed Lab Archive |
 1560057 Foliage basal rosette Anthony D. White |
 1560058 Foliage basal rosette Ohio State Weed Lab Archive |
 1560059 Seedling(s) Ohio State Weed Lab Archive |
 1560060 Seedling(s) cotyledons Ken Chamberlain |
 1560061 Seedling(s) Theodore Webster |
 1560062 Seedling(s) Ohio State Weed Lab Archive |
 1560063 Foliage basal rosette Ohio State Weed Lab Archive |
 1560064 Stem(s) Theodore Webster |
 1560065 Seedling(s) cotyledons Ohio State Weed Lab Archive |
 1560066 Seedling(s) Ohio State Weed Lab Archive |
 1560067 Foliage Ohio State Weed Lab Archive |
 1560069 Seedling(s) Ohio State Weed Lab Archive |
 1560070 Seedling(s) cortyledons Brian Sugarman |
 1560071 Seedling(s) cotyledons Ohio State Weed Lab Archive |
 1560072 Seedling(s) cotyledons Ohio State Weed Lab Archive |
 1560073 Flower(s) Ohio State Weed Lab Archive |
 1929056 Infestation in canola (Rape seed) field near Consort, Alberta Alec McClay |
 1929057 Plant(s) Leslie Dietz |
 5090084 Plant(s) Mary Ellen (Mel) Harte |
 5090085 Flower(s) Mary Ellen (Mel) Harte |
 5090086 Foliage Mary Ellen (Mel) Harte |
 5090088 Foliage Mary Ellen (Mel) Harte |
 5090089 Flower(s) Mary Ellen (Mel) Harte |
 5230083 Flower(s) Female flower heads Richard Old |
 5230084 Fruit(s) Female flower heads Richard Old |
 5230085 Flower(s) Male flower heads Richard Old |
 5230086 Flower(s) Male flower heads Richard Old |
 5230087 Plant(s) Richard Old |
 5270075 Flower(s) Flowers-white morph Leslie J. Mehrhoff |
 5270076 Infestation Leslie J. Mehrhoff |
 5270077 Flower(s) Close-up of flowers Leslie J. Mehrhoff |
 5270078 Plant(s) Leslie J. Mehrhoff |
 5270079 Flower(s) Leslie J. Mehrhoff |
 5270080 Infestation Leslie J. Mehrhoff |
 5270081 Foliage Leslie J. Mehrhoff |
 5307004 Diagram or Graphic Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 3: 553. USDA PLANTS Database |
 5307005 Seed(s) Steve Hurst |
 5307006 Diagram or Graphic USDA NRCS. Wetland flora: Field office illustrated guide to plant species. USDA Natural Resources Conservation Service. USDA PLANTS Database |
 5310003 Seed(s) Ken Chamberlain |
 5330089 Plant(s) Todd Pfeiffer |
 5356266 Flower(s) Terry L Spivey |
 5356268 Flower(s) Terry L Spivey |
 5358460 Plant(s) Rosettes of Canada thistle (Cirsium arvense). Howard F. Schwartz |
 5358615 Plant(s) Canada thistle plants (Cirsium arvense) going to seed along a roadside. L.L. Berry |
 5358628 Plant(s) A Canada thistle (Cirsium arvense) plant going to seed. L.L. Berry |
 5358629 Plant(s) Canada thistle (Cirsium arvense) at the rosette stage. L.L. Berry |
 5358630 Foliage Close-up view of the spines and waxy cuticle of Canada thistle (Cirsium arvense) leaves. L.L. Berry |
 5358631 Plant(s) Mature Canada thistle plant, Cirsium arvense. L.L. Berry |
 5358632 Flower(s) Close-up view of buds and flower of Canada thistle (Cirsium arvense). L.L. Berry |
 5360185 Seed(s) Seed heads (capitula) of Canada thistle K. George Beck |
 5360187 Flower(s) Canada thistle early bud
K. George Beck |
 5362875 Seedling(s) Seedling (or young rosette) of Canada thistle, Cirsium arvense. Phil Westra |
 5362876 Infestation Canada thistle plants (Cirsium arvense) infesting field corn. Phil Westra |
 5364422 Seed(s) Seeds of Canada thistle (Cirsium arvense). Howard F. Schwartz |
 5374379 Infestation male plants on left and female on right Joseph M. DiTomaso |
 5374380 Flower(s) female flowers Joseph M. DiTomaso |
 5374381 Flower(s) male flowers Joseph M. DiTomaso |
 5374382 Plant(s) young sprout from rhizome Joseph M. DiTomaso |
 5376367 Fruit(s) Julia Scher |
 5376368 Fruit(s) apex of an achene Julia Scher |
 5376369 Fruit(s) base of achene Julia Scher |
 5376370 Fruit(s) cross section of achene Julia Scher |
 5385901 Flower(s) Jan Samanek |
 5385902 Field Jan Samanek |
 5385903 Plant(s) Jan Samanek |
 5385904 Plant(s) with mature seed Jan Samanek |
 5385905 Flower(s) Jan Samanek |
 5385906 Plant(s) with mature seed Jan Samanek |
 5385907 Flower(s) Jan Samanek |
 5385908 Flower(s) Jan Samanek |
 5385909 Seed(s) Jan Samanek |
 5385910 Seed(s) Jan Samanek |
 5385911 Foliage Jan Samanek |
 5385912 Foliage Jan Samanek |
 5385913 Foliage Jan Samanek |
 5385914 Flower(s) Jan Samanek |
 5391602 Plant(s) Weird white foliage Barry Rice |
 5392045 Fruit(s) Seedheads John M. Randall |
 5392046 Flower(s) John M. Randall |
 5392047 Flower(s) Flowerheads John M. Randall |
 5392048 Plant(s) Plants John M. Randall |
 5392049 Flower(s) Male inflorescence John M. Randall |
 5392050 Flower(s) John M. Randall |
 5392051 Flower(s) John M. Randall |
 5392052 Flower(s) John M. Randall |
 5392053 Flower(s) John M. Randall |
 5392054 Flower(s) John M. Randall |
 5398054 Plant(s) leaf Robert Vidéki |
 5398055 Plant(s) leaf Robert Vidéki |
 5398056 Plant(s) leaf Robert Vidéki |
 5398554 Plant(s) leaf Robert Vidéki |
 5398555 Plant(s) leaf Robert Vidéki |
