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Calflora |
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| Searching for: | genus: Cirsium |
| Click on the Scientific Name to see a Taxon Report. | |
| Cirsium andersonii | |||
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Anderson's thistle
native
Perennial herb |
 © 2019 Bob Sweatt |
 © 2006 Steve Matson CalPhotos (UCB) |
 © 2012 Paul Preston and Tim Lukaszewski |
| Cirsium andrewsii | |||
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Franciscan thistle
rare, native
Perennial herb |
 © 2011 Thomas Reyes CalPhotos (UCB) |
 © 2013 Robert Sikora CalPhotos (UCB) |
 © 2011 Thomas Reyes CalPhotos (UCB) |
| Cirsium arizonicum | |||
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Arizona thistle
native
Perennial herb |
 © 2016 Steve Matson CalPhotos (UCB) |
 © 2012 James M. Andre CalPhotos (UCB) |
 © 2007 Steven Thorsted CalPhotos (UCB) |
| Cirsium arizonicum var. arizonicum | |||
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Arizona thistle
native
Perennial herb |
 © 2012 Dylan Neubauer CalPhotos (UCB) |
 © 2017 Neal Kramer CalPhotos (UCB) |
 © 2016 Steve Matson CalPhotos (UCB) |
| Cirsium arizonicum var. tenuisectum | |||
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Desert mountain thistle
rare, native
Perennial herb |
 © 2009 James M. Andre CalPhotos (UCB) |
 © 2014 John Doyen CalPhotos (UCB) |
 © 2003 Hartmut Wisch CalPhotos (UCB) |
| Cirsium arvense | |||
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Canada thistle
invasive non-native
Perennial herb |
 © 2008 Keir Morse CalPhotos (UCB) |
 © 2018 Joel Trumbo |
 © 2007 Luigi Rignanese CalPhotos (UCB) |
| Cirsium brevistylum | |||
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Indian thistle
native
Perennial herb |
 © 2007 Neal Kramer CalPhotos (UCB) |
 © 2014 Margo Bors CalPhotos (UCB) |
 © 2018 Brian Charles |
| Cirsium canescens | |||
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Prairie thistle
non-native
Perennial herb |
 © 2010 Lee Dittmann CalPhotos (UCB) |
 © 2008 Zoya Akulova CalPhotos (UCB) |
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| Cirsium ciliolatum | |||
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Ashland thistle
rare, native
Perennial herb |
 © 2017 Gerald Carr |
 © 2017 Gerald Carr |
 © 2017 Gerald Carr |
| Cirsium crassicaule | |||
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Slough thistle
rare, native
Annual, Perennial herb |
 © 2020 Steve Laymon |
 © 2020 Steve Laymon |
 © 2020 Steve Laymon |
| Cirsium cymosum | |||
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Peregrine thistle
native
Perennial herb |
 © 2017 Dee Shea Himes |
 © 2019 Industrious Walkers of the World |
 © 2009 Julie Kierstead Nelson CalPhotos (UCB) |
| Cirsium cymosum var. canovirens | |||
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Gray-green thistle
native
Perennial herb |
 © 2008 Ron Wolf CalPhotos (UCB) |
 © 2005 Steve Tyron CalPhotos (UCB) |
 © 2006 Steve Matson CalPhotos (UCB) |
| Cirsium cymosum var. cymosum | |||
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Peregrine thistle
native
Perennial herb |
 © 2014 Neal Kramer CalPhotos (UCB) |
 © 2013 Aaron Arthur CalPhotos (UCB) |
 © 2013 Aaron Arthur CalPhotos (UCB) |
| Cirsium douglasii | |||
|
Swamp thistle
native
Perennial herb |
 © 2019 Julie Kierstead Nelson |
 © 2011 Aaron Arthur CalPhotos (UCB) |
 © 1998 James B. Gratiot CalPhotos (UCB) |
| Cirsium douglasii var. breweri | |||
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Brewer's swamp thistle
native
Perennial herb |
© 2019 Julie Kierstead Nelson |
 © 2010 John Dittes CalPhotos (UCB) |
 © 2019 Julie A. Kierstead |
| Cirsium douglasii var. douglasii | |||
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Douglas' swamp thistle
native
Perennial herb |
 © 2006 Matt Below CalPhotos (UCB) |
 © 2011 Neal Kramer |
 © 2011 Neal Kramer |
| Cirsium fontinale | |||
|
Fountain thistle
native
Perennial herb |
 © 2007 Neal Kramer CalPhotos (UCB) |
 © 2012 Lech Naumovich CalPhotos (UCB) |
 © 2009 Tom Cochrane CalPhotos (UCB) |
| Cirsium fontinale var. campylon | also called Cirsium campylon | ||
|
Mt. hamilton thistle
rare, native
Perennial herb |
 © 2004 David A. Tharp CalPhotos (UCB) |
 © Benjamin C. Hammett 2002 California Academy of Sciences CalPhotos (UCB) |
 © 2014 Chris Winchell CalPhotos (UCB) |
| Cirsium fontinale var. fontinale | |||
|
Fountain thistle
rare, native
Perennial herb |
 © 2007 Toni Corelli CalPhotos (UCB) |
 © 2011 Scott Cox CalPhotos (UCB) |
 © 2010 Neal Kramer CalPhotos (UCB) |
| Cirsium fontinale var. obispoense | |||
|
Chorro creek bog thistle
rare, native
Perennial herb |
 © 2017 Cindy Roessler |
 © 2015 David Wolfson |
 © 2012 Lynn Robertson CalPhotos (UCB) |
| Cirsium hydrophilum | |||
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Suisun thistle
native
Perennial herb |
 © 2010 Doug Wirtz CalPhotos (UCB) |
 © 2011 Thomas Reyes CalPhotos (UCB) |
 © 2010 Doug Wirtz CalPhotos (UCB) |
| Cirsium hydrophilum var. hydrophilum | |||
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Suisun thistle
rare, native
Perennial herb |
© 2010 Doug Wirtz CalPhotos (UCB) |
 © 2010 Doug Wirtz CalPhotos (UCB) |
 © 2010 Doug Wirtz CalPhotos (UCB) |
| Cirsium hydrophilum var. vaseyi | |||
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Mt. Tamalpais thistle
rare, native
Perennial herb |
 © 2018 Eliezer Margolis |
 © 2011 Vernon Smith CalPhotos (UCB) |
 © 2019 Claire Mallen |
| Cirsium inamoenum | |||
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Greene's thistle
native
Perennial herb |
 © 2013 Barry Breckling CalPhotos (UCB) |
 © 2020 Bob Sweatt |
 © 2020 Bob Sweatt |
| Cirsium inamoenum var. inamoenum | |||
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Greene's thistle
native
Perennial herb |
 © 2012 Gary A. Monroe CalPhotos (UCB) |
 © 2014 Barry Rice CalPhotos (UCB) |
 © 2012 Gary A. Monroe CalPhotos (UCB) |
| Cirsium mohavense | |||
|
Mohave thistle
native
Perennial herb |
 © 2018 Ron Vanderhoff |
 © 2017 Thomas Egan |
 © 2020 Lisa Berry |
| Cirsium neomexicanum | |||
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Desert thistle
native
Perennial herb |
 © 2004 James M. Andre CalPhotos (UCB) |
 © 2005 James M. Andre CalPhotos (UCB) |
 © 2013 Belinda Lo CalPhotos (UCB) |
| Cirsium occidentale | |||
|
Western thistle
native
Perennial herb |
 © 2018 Stacie Wolny |
 © 2020 Ron Vanderhoff |
 © 2020 Diane Etchison |
| Cirsium occidentale var. californicum | |||
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California thistle
native
Perennial herb |
 © 2014 James Gonsman |
 © 2013 James Gonsman |
 © 2008 Thomas Stoughton CalPhotos (UCB) |
| Cirsium occidentale var. candidissimum | |||
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Snowy thistle
native
Perennial herb |
 © 2020 R.A. Chasey |
 © 2019 Matt Berger |
 © 2018 Debra Valov |
| Cirsium occidentale var. compactum | |||
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Compact cobwebby thistle
rare, native
Perennial herb |
 © 2019 Marisa Persaud |
 © 2016 Talila Golan |
 © 2011 Chris Winchell CalPhotos (UCB) |
| Cirsium occidentale var. coulteri | |||
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Coulter's thistle
native
Perennial herb |
no photo |
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| Cirsium occidentale var. lucianum | |||
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Cuesta ridge thistle
rare, native
Perennial herb |
 © 2019 David Greenberger |
 © 2009 Zachary Green CalPhotos (UCB) |
 © 2011 Chris Winchell CalPhotos (UCB) |
| Cirsium occidentale var. occidentale | |||
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Cobweb thistle
native
Perennial herb |
 © 2018 Ken Hickman |
 © 2009 John W. Wall CalPhotos (UCB) |
 © 2019 Randy Huey |
| Cirsium occidentale var. venustum | |||
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Venus thistle
native
Perennial herb |
 © 2004 David A. Tharp CalPhotos (UCB) |
 © 2010 James M. Andre CalPhotos (UCB) |
 © 2020 Sara Timby |
| Cirsium ochrocentrum | |||
|
Beaumont thistle
non-native
Perennial herb |
 © 2004 Robert Sivinski CalPhotos (UCB) |
 © 2001 CDFA CalPhotos (UCB) |
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| Cirsium ochrocentrum var. ochrocentrum | |||
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Yellowspine thistle
non-native
Perennial herb |
 © 2016 Wynn Anderson CalPhotos (UCB) |
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| Cirsium praeteriens | |||
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Palo alto thistle
rare, native
Perennial herb |
no photo |
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| Cirsium quercetorum | |||
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Brownie thistle
native
Annual, Perennial herb |
 © 2007 Neal Kramer CalPhotos (UCB) |
 © 2020 R.A. Chasey |
 © 2013 James Gonsman |
| Cirsium remotifolium | |||
|
Few leaved thistle
native
Perennial herb |
 © 2008 Keir Morse CalPhotos (UCB) |
 © 2008 Keir Morse CalPhotos (UCB) |
 © 2008 Keir Morse CalPhotos (UCB) |
| Cirsium remotifolium var. odontolepis | |||
|
Pacific fringed thistle
native
Perennial herb |
 © 2018 Hunter Breck CalPhotos (UCB) |
 © 2018 Hunter Breck CalPhotos (UCB) |
 © 2020 MCOSD EDRR |
| Cirsium remotifolium var. remotifolium | |||
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Remote-leaved thistle
native
Perennial herb |
© © 2008 Keir Morse CalPhotos (UCB) |
© 2008 Keir Morse CalPhotos (UCB) |
© 2008 Keir Morse CalPhotos (UCB) |
| Cirsium remotifolium var. rivulare | |||
|
Klamath thistle
native
Perennial herb |
 © 2011 Gerald Carr |
 © 2011 Gerald Carr |
 © 2011 Gerald Carr |
| Cirsium rhothophilum | |||
|
Surf thistle
rare, native
Perennial herb |
 © 2011 Chris Winchell CalPhotos (UCB) |
 © 2011 Chris Winchell CalPhotos (UCB) |
 © 2017 John Doyen CalPhotos (UCB) |
| Cirsium scabrum | |||
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Rough thistle
non-native
Perennial herb |
no photo |
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| Cirsium scariosum | |||
|
Elk thistle
native
Perennial herb |
 © 2020 Bob Sweatt |
 © 2016 Julie Kierstead Nelson |
 © 2020 Bob Sweatt |
| Cirsium scariosum var. americanum | |||
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Dinnerplate thistle
native
Perennial herb |
 © 2020 Bob Sweatt |
 © 2014 Neal Kramer CalPhotos (UCB) |
 © 2013 Robert F Norris CalPhotos (UCB) |
| Cirsium scariosum var. citrinum | |||
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Southern meadow thistle
native
Perennial herb |
no photo |
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| Cirsium scariosum var. congdonii | |||
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Elk thistle
native
Perennial herb |
 © 1982 Dean Wm. Taylor CalPhotos (UCB) |
 © 2012 Nicholas Jensen CalPhotos (UCB) |
 © 2017 Neal Kramer CalPhotos (UCB) |
| Cirsium scariosum var. loncholepis | also called Cirsium loncholepis | ||
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La graciosa thistle
rare, native
Perennial herb |
 © 2011 Chris Winchell CalPhotos (UCB) |
 © 2012 Anuja Parikh and Nathan Gale CalPhotos (UCB) |
 © 2011 Chris Winchell CalPhotos (UCB) |
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