Family: Asteraceae Aster Family
Genus: Cirsium Thistle
Spiny, biennial or perennial herbs (rarely annuals). Thistles of the genus Cirsium are distinguished by their feathery pappus from members of the genus Carduus (plumeless or simple pappus).
Scientific Name: Cirsium arvense (L.) Scop.
Common Name(s): Canada Thistle, Field Thistle, Creeping Thistle, Californian Thistle
Growth Type: perennial
Species Description:
Click on the thumbnails to view large image.
 | Caption: plant image
ID: Hrb-CIRAR-001
Source: 35mm slide (photo)
Credit:
Keyword(s): leaf, seedling
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 | Caption: plant image
ID: Hrb-CIRAR-002
Source: 35mm slide (photo)
Credit:
Keyword(s): leaf, seedling
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 | Caption: plant image
ID: Hrb-CIRAR-003
Source: 35mm slide (photo)
Credit:
Keyword(s): leaf, seedling
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 | Caption: plant image
ID: Hrb-CIRAR-004
Source: 35mm slide (photo)
Credit:
Keyword(s): leaf, seedling
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 | Caption: plant image
ID: Hrb-CIRAR-005
Source: 35mm slide (photo)
Credit:
Keyword(s): leaf, seedling
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 | Caption: plant image
ID: Hrb-CIRAR-006
Source: 35mm slide (photo)
Credit:
Keyword(s): leaf, seedling
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 | Caption: plant image
ID: Hrb-CIRAR-007
Source: 35mm slide (photo)
Credit:
Keyword(s): leaf, seedling
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 | Caption: plant image
ID: Hrb-CIRAR-008
Source: 35mm slide (photo)
Credit:
Keyword(s): vegetative
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 | Caption: plant image
ID: Hrb-CIRAR-009
Source: 35mm slide (photo)
Credit:
Keyword(s): seedling
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 | Caption: plant image
ID: Hrb-CIRAR-010
Source: 35mm slide (photo)
Credit:
Keyword(s): seedling
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 | Caption: plant image
ID: Hrb-CIRAR-011
Source: 35mm slide (photo)
Credit:
Keyword(s): flowering, inflorescense
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 | Caption: plant image
ID: Hrb-CIRAR-012
Source: 35mm slide (illustration)
Credit:
Keyword(s): leaf
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 | Caption: plant image
ID: Hrb-CIRAR-013
Source: 35mm slide (photo)
Credit:
Keyword(s): mature, vegetative
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 | Caption: plant image
ID: Hrb-CIRAR-014
Source: 35mm slide (photo)
Credit:
Keyword(s): flowering, inflorescense
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 | Caption: plant image
ID: Hrb-CIRAR-015
Source: 35mm slide (photo)
Credit:
Keyword(s): flowering, inflorescense
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 | Caption: plant image
ID: Hrb-CIRAR-016
Source: 35mm slide (photo)
Credit:
Keyword(s): flowering, inflorescense, vegetative
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 | Caption: plant image
ID: Hrb-CIRAR-017
Source: 35mm slide (illustration)
Credit:
Keyword(s): leaf, root
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 | Caption: plant image
ID: Hrb-CIRAR-018
Source: 35mm slide (photo)
Credit:
Keyword(s): flowering, inflorescense, vegetative
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 | Caption: plant image
ID: Hrb-CIRAR-019
Source: 35mm slide (photo)
Credit:
Keyword(s): flowering, inflorescense
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 | Caption: plant image
ID: Hrb-CIRAR-020
Source: 35mm slide (photo)
Credit:
Keyword(s): inflorescense, mature
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 | Caption: plant image
ID: Hrb-CIRAR-021
Source: 35mm slide (photo)
Credit:
Keyword(s): flowering, inflorescense, vegetative
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 | Caption: plant image
ID: Hrb-CIRAR-022
Source: 35mm slide (photo)
Credit:
Keyword(s): leaf, stem, vegetative
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 | Caption: plant image
ID: Hrb-CIRAR-023
Source: 35mm slide (photo)
Credit:
Keyword(s): mature
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 | Caption: plant image
ID: Hrb-CIRAR-024
Source: 35mm slide (photo)
Credit:
Keyword(s): flowering, inflorescense, vegetative
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 | Caption: plant image
ID: Hrb-CIRAR-025
Source: 35mm slide (photo)
Credit:
Keyword(s): flowering, inflorescense
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 | Caption: plant image
ID: Hrb-CIRAR-026
Source: 35mm slide (photo)
Credit:
Keyword(s): flowering, inflorescense
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 | Caption: plant image
ID: Hrb-CIRAR-027
Source: 35mm slide (photo)
Credit:
Keyword(s): inflorescense, mature
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 | Caption: plant image
ID: Hrb-CIRAR-028
Source: 35mm slide (photo)
Credit:
Keyword(s): leaf
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 | Caption: plant image
ID: Hrb-CIRAR-029
Source: 35mm slide (photo)
Credit:
Keyword(s): seedling
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 | Caption: plant image
ID: Hrb-CIRAR-030
Source: 35mm slide (photo)
Credit:
Keyword(s): leaf, vegetative
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 | Caption: plant image
ID: Hrb-CIRAR-031
Source: 35mm slide (photo)
Credit:
Keyword(s): inflorescense, mature
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 | Caption: plant image
ID: Hrb-CIRAR-032
Source: 35mm slide (photo)
Credit:
Keyword(s): seed
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 | Caption: plant image
ID: Hrb-CIRAR-033
Source: 35mm slide (photo)
Credit:
Keyword(s): flowering, inflorescense
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 | Caption: plant image
ID: Hrb-CIRAR-034
Source: 35mm slide (illustration)
Credit:
Keyword(s): root
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 | Caption: plant image
ID: Hrb-CIRAR-035
Source: 35mm slide (photo)
Credit:
Keyword(s): inflorescense, mature
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 | Caption: plant image
ID: Hrb-CIRAR-036
Source: 35mm slide (illustration)
Credit:
Keyword(s): mature
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 | Caption: plant image
ID: Hrb-CIRAR-037
Source: 35mm slide (photo)
Credit:
Keyword(s): seed
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 | Caption: plant image
ID: Hrb-CIRAR-038
Source: 35mm slide (photo)
Credit:
Keyword(s): seed
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 | Caption: plant image
ID: Hrb-CIRAR-039
Source: 35mm slide (photo)
Credit:
Keyword(s): leaf, vegetative
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 | Caption: plant image
ID: Hrb-CIRAR-040
Source: 35mm slide (photo)
Credit:
Keyword(s): leaf, vegetative
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 | Caption: plant image
ID: Hrb-CIRAR-041
Source: 35mm slide (photo)
Credit:
Keyword(s): flowering, inflorescense
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 | Caption: plant image
ID: Hrb-CIRAR-042
Source: 35mm slide (photo)
Credit:
Keyword(s): seedling
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 | Caption: plant image
ID: Hrb-CIRAR-043
Source: 35mm slide (photo)
Credit:
Keyword(s): seed
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 | Caption: plant image
ID: Hrb-CIRAR-044
Source: 35mm slide (photo)
Credit:
Keyword(s): seed
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 | Caption: plant image
ID: Hrb-CIRAR-045
Source: 35mm slide (photo)
Credit:
Keyword(s): mature
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 | Caption: plant image
ID: Hrb-CIRAR-046
Source: 35mm slide (photo)
Credit:
Keyword(s): flowering, inflorescense
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