Cirsium arvense Canada Thistle (shown with Cirsium vulgare) ID: 0175 3301 2288 0074 [detail] © 2001 CDFA
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Cirsium arvense Canada Thistle ID: 8120 3181 4565 0057 [detail] Charles Webber © 1998 California Academy of Sciences
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Cirsium arvense Canada Thistle ID: 8120 3181 4014 0130 [detail] Charles Webber © 1998 California Academy of Sciences
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Cirsium arvense Canada Thistle ID: 0175 3301 2288 0067 [detail] © 2001 CDFA
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Cirsium arvense Californian Thistle ID: 0000 0000 0904 0552 [detail] © 2004 Steve Matson
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Cirsium arvense Californian Thistle ID: 0000 0000 0904 0554 [detail] © 2004 Steve Matson
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Cirsium arvense Californian Thistle ID: 0000 0000 0105 1694 [detail] © 2005 Louis-M. Landry
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Cirsium arvense Californian Thistle ID: 0000 0000 0105 1695 [detail] © 2005 Louis-M. Landry
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Cirsium arvense Californian Thistle ID: 0000 0000 0105 1696 [detail] © 2005 Louis-M. Landry
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Cirsium arvense Californian Thistle ID: 0000 0000 0905 1312 [detail] © 2005 Luigi Rignanese
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Cirsium arvense Californian Thistle ID: 0000 0000 0905 1314 [detail] © 2005 Luigi Rignanese
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Cirsium arvense Californian Thistle ID: 0000 0000 0905 1334 [detail] © 2005 Luigi Rignanese
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Cirsium arvense Canada Thistle ID: 0000 0000 1208 0592 [detail] © 2008 Keir Morse
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Cirsium arvense Canada Thistle ID: 0000 0000 1208 0593 [detail] © 2008 Keir Morse
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Cirsium arvense Canada Thistle ID: 0000 0000 1208 0594 [detail] © 2008 Keir Morse
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Cirsium arvense Canada Thistle ID: 0000 0000 1208 0595 [detail] © 2008 Keir Morse
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Cirsium arvense Canada Thistle ID: 0000 0000 0509 1943 [detail] © 2009 Barry Rice
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Cirsium arvense Canada Thistle (shown with Satyrium saepium (hedgerow hairstreak)) ID: 0000 0000 0809 0740 [detail] © 2009 Christopher L. Christie
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Cirsium arvense Creeping Thistle ID: 0000 0000 1209 1407 [detail] © 2009 Neal Kramer
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Cirsium arvense Creeping Thistle ID: 0000 0000 1209 1408 [detail] © 2009 Neal Kramer
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Cirsium arvense Creeping Thistle ID: 0000 0000 1209 1409 [detail] © 2009 Neal Kramer
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Cirsium arvense Creeping Thistle ID: 0000 0000 0910 1646 [detail] © 2010 Ron Wolf
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Cirsium arvense Creeping Thistle ID: 0000 0000 0910 1647 [detail] © 2010 Ron Wolf
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Cirsium arvense Canada thistle ID: 0000 0000 0114 1653 [detail] © 2014 John Doyen
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