Calflora
Showing records 1 - 50 out of  54 matching records.
Searching for: genus: Cirsium
Click on the Scientific Name to see a Taxon Report.
Cirsium andersonii
Anderson's thistle
native
Perennial herb
Cirsium andersonii
© 2006 Matt Below
Cirsium andersonii
© 2010 John Dittes
Cirsium andersonii
© 2009 Keir Morse
Cirsium andrewsii
Franciscan thistle
rare, native
Perennial herb
Cirsium andrewsii
© 2011 Thomas Reyes
Cirsium andrewsii
© 2011 Thomas Reyes
Cirsium andrewsii
© 2011 Thomas Reyes
Cirsium arizonicum
Arizona thistle
native
Perennial herb
Cirsium arizonicum
© 2007 Steven Thorsted
Cirsium arizonicum
© 2007 Steven Thorsted
Cirsium arizonicum var. arizonicum
Arizona thistle
native
Perennial herb
Cirsium arizonicum var. arizonicum
© 2012 Dylan Neubauer
Cirsium arizonicum var. arizonicum
© 2012 Dylan Neubauer
Cirsium arizonicum var. tenuisectum
Desert mountain thistle
rare, native
Perennial herb
Cirsium arizonicum var. tenuisectum
© 2009 James M. Andre
Cirsium arizonicum var. tenuisectum
© 2009 James M. Andre
Cirsium arvense
Canada thistle
invasive non-native
Perennial herb
Cirsium arvense
© 2008 Keir Morse
Cirsium arvense
© 2007 Luigi Rignanese
Cirsium arvense
© 2009 Phil Pullen
Cirsium brevistylum
Indian thistle
native
Perennial herb
Cirsium brevistylum
© 2007 Neal Kramer
Cirsium brevistylum
© 2008 Zoya Akulova
Cirsium brevistylum
© 2010 Robert Steers/NPS
Cirsium canescens
Prairie thistle
non-native
Perennial herb
Cirsium canescens
© 2010 Lee Dittmann
Cirsium canescens
© 2008 Zoya Akulova
Cirsium ciliolatum
Ashland thistle
rare, native
Perennial herb
Cirsium ciliolatum
© 2017 Gerald Carr
Cirsium ciliolatum
© 2017 Gerald Carr
Cirsium ciliolatum
© 2017 Gerald Carr
Cirsium crassicaule
Slough thistle
rare, native
Annual, Perennial herb
no photo
Cirsium cymosum
Peregrine thistle
native
Perennial herb
Cirsium cymosum
© 2009 Keir Morse
Cirsium cymosum
© 2009 Keir Morse
Cirsium cymosum
© 2009 Julie Kierstead Nelson
Cirsium cymosum var. canovirens
Gray-green thistle
native
Perennial herb
Cirsium cymosum var. canovirens
© 2005 Steve Tyron
Cirsium cymosum var. canovirens
© 2005 Steve Tyron
Cirsium cymosum var. cymosum
Peregrine thistle
native
Perennial herb
Cirsium cymosum var. cymosum
© 2014 Neal Kramer
Cirsium cymosum var. cymosum
© 2013 Aaron Arthur
Cirsium cymosum var. cymosum
© 2013 Aaron Arthur
Cirsium douglasii
Swamp thistle
native
Perennial herb
Cirsium douglasii
© 2011 Aaron Arthur
Cirsium douglasii
© 2010 John Dittes
Cirsium douglasii
© 2010 Sangeet Khalsa
Cirsium douglasii var. breweri
Brewer's swamp thistle
native
Perennial herb
Cirsium douglasii var. breweri
© 2010 John Dittes
Cirsium douglasii var. breweri
© 2010 Sangeet Khalsa
Cirsium douglasii var. breweri
© 2010 Sangeet Khalsa
Cirsium douglasii var. douglasii
Douglas' swamp thistle
native
Perennial herb
Cirsium douglasii var. douglasii
© 2006 Matt Below
Cirsium douglasii var. douglasii
© 2013 Neal Kramer
Cirsium douglasii var. douglasii
© 2008 Neal Kramer
Cirsium fontinale
Fountain thistle
native
Perennial herb
Cirsium fontinale
© 2007 Neal Kramer
Cirsium fontinale
© 2012 Lech Naumovich
Cirsium fontinale
© 2009 Tom Cochrane
Cirsium fontinale var. campylon formerly Cirsium campylon
Mt. hamilton thistle
rare, native
Perennial herb
Cirsium fontinale var. campylon
© 2004 David A. Tharp
Cirsium fontinale var. campylon
© 2014 Chris Winchell
Cirsium fontinale var. campylon
© 2014 Chris Winchell
Cirsium fontinale var. fontinale
Fountain thistle
rare, native
Perennial herb
Cirsium fontinale var. fontinale
© 2007 Toni Corelli
Cirsium fontinale var. fontinale
© 2011 Scott Cox
Cirsium fontinale var. fontinale
© 2010 Neal Kramer
Cirsium fontinale var. obispoense
Chorro creek bog thistle
rare, native
Perennial herb
Cirsium fontinale var. obispoense
© 2012 Lynn Robertson
Cirsium fontinale var. obispoense
© 2012 Lynn Robertson
Cirsium fontinale var. obispoense
© 2012 Lynn Robertson
Cirsium hydrophilum
Suisun thistle
native
Perennial herb
Cirsium hydrophilum
© 2010 Doug Wirtz
Cirsium hydrophilum
© 2011 Thomas Reyes
Cirsium hydrophilum
© 2010 Doug Wirtz
Cirsium hydrophilum var. hydrophilum
Suisun thistle
rare, native
Perennial herb
Cirsium hydrophilum var. hydrophilum
© 2010 Doug Wirtz
Cirsium hydrophilum var. hydrophilum
© 2010 Doug Wirtz
Cirsium hydrophilum var. vaseyi
Mt. tamalpais thistle
rare, native
Perennial herb
Cirsium hydrophilum var. vaseyi
© 1999 John Game
Cirsium hydrophilum var. vaseyi
© 2011 Thomas Reyes
Cirsium hydrophilum var. vaseyi
© 2009 Vernon Smith
Cirsium inamoenum
Greene's thistle
native
Perennial herb
Cirsium inamoenum
© 2013 Barry Breckling
Cirsium inamoenum
© 2014 John Doyen
Cirsium inamoenum
© 2014 Barry Rice
Cirsium inamoenum var. inamoenum
Greene's thistle
native
Perennial herb
Cirsium inamoenum var. inamoenum
© 2012 Gary A. Monroe
Cirsium inamoenum var. inamoenum
© 2012 Gary A. Monroe
Cirsium inamoenum var. inamoenum
© 2012 Gary A. Monroe
Cirsium mohavense
Mohave thistle
native
Perennial herb
Cirsium mohavense
© 2007 Trent M. Draper
Cirsium mohavense
© 2007 Thomas Stoughton
Cirsium mohavense
© 2012 Lynn Robertson
Cirsium neomexicanum
Desert thistle
native
Perennial herb
Cirsium neomexicanum
© 2004 James M. Andre
Cirsium neomexicanum
© 2005 James M. Andre
Cirsium neomexicanum
© 2013 Belinda Lo
Cirsium occidentale
Western thistle
native
Perennial herb
Cirsium occidentale
© 2006 Chris Wagner, SBNF
Cirsium occidentale
© 2006 Steve Matson
Cirsium occidentale
© 2008 Thomas Stoughton
Cirsium occidentale var. californicum
California thistle
native
Perennial herb
Cirsium occidentale var. californicum
© 2007 Matt Below
Cirsium occidentale var. californicum
© 2008 Thomas Stoughton
Cirsium occidentale var. californicum
© 2004 Tom Greer tbphotos@comcast.net
Cirsium occidentale var. candidissimum
Snowy thistle
native
Perennial herb
Cirsium occidentale var. candidissimum
© 2002 Gary A. Monroe
Cirsium occidentale var. candidissimum
© 2003 Joseph Dougherty/ecology.org
Cirsium occidentale var. candidissimum
© 2015 Richard Spellenberg
Cirsium occidentale var. compactum
Compact cobwebby thistle
rare, native
Perennial herb
Cirsium occidentale var. compactum
© 2011 Chris Winchell
Cirsium occidentale var. compactum
© 2005 Laura Ann Eliassen
Cirsium occidentale var. compactum
© 2011 Chris Winchell
Cirsium occidentale var. coulteri
Coulter's thistle
native
Perennial herb
no photo
Cirsium occidentale var. lucianum
Cuesta ridge thistle
rare, native
Perennial herb
Cirsium occidentale var. lucianum
© 2009 Zachary Green
Cirsium occidentale var. lucianum
© 2011 Chris Winchell
Cirsium occidentale var. occidentale
Cobweb thistle
native
Perennial herb
Cirsium occidentale var. occidentale
© 2011 Dylan Neubauer
Cirsium occidentale var. occidentale
© 2009 Dr. Mark S. Brunell
Cirsium occidentale var. occidentale
© 2009 Dr. Mark S. Brunell
Cirsium occidentale var. venustum
Coulter's thistle
native
Perennial herb
Cirsium occidentale var. venustum
© 2004 David A. Tharp
Cirsium occidentale var. venustum
© 2011 Steve Matson
Cirsium occidentale var. venustum
© 2001 Jeff Abbas
Cirsium ochrocentrum
Beaumont thistle
non-native
Perennial herb
Cirsium ochrocentrum
© 2004 Robert Sivinski
Cirsium ochrocentrum
© 2001 CDFA
Cirsium ochrocentrum var. ochrocentrum
Yellowspine thistle
non-native
Perennial herb
no photo
Cirsium praeteriens
Palo alto thistle
rare, native
Perennial herb
no photo
Cirsium quercetorum
Brownie thistle
native
Annual, Perennial herb
Cirsium quercetorum
© 2007 Neal Kramer
Cirsium quercetorum
© 2010 Zoya Akulova
Cirsium quercetorum
© 2010 Robert Steers/NPS
Cirsium remotifolium
Few leaved thistle
native
Perennial herb
Cirsium remotifolium
© 2008 Keir Morse
Cirsium remotifolium
© 2008 Keir Morse
Cirsium remotifolium
© 2008 Keir Morse
Cirsium remotifolium var. odontolepis
Pacific fringed thistle
native
Perennial herb
Cirsium remotifolium var. odontolepis
© 2018 Hunter Breck
Cirsium remotifolium var. odontolepis
© 2018 Hunter Breck
Cirsium remotifolium var. odontolepis
© 2018 Hunter Breck
Cirsium remotifolium var. remotifolium
Remote-leaved thistle
native
Perennial herb
Cirsium remotifolium var. remotifolium
© © 2008 Keir Morse
Cirsium remotifolium var. remotifolium
© 2008 Keir Morse
Cirsium remotifolium var. remotifolium
© 2008 Keir Morse
Cirsium remotifolium var. rivulare
Klamath thistle
native
Perennial herb
no photo
Cirsium rhothophilum
Surf thistle
rare, native
Perennial herb
Cirsium rhothophilum
© 1984 California Native Plant Society
Cirsium rhothophilum
© 1984 California Native Plant Society
Cirsium scabrum
Rough thistle
non-native
Perennial herb
no photo
Cirsium scariosum
Elk thistle
native
Perennial herb
Cirsium scariosum
© 2008 Neal Kramer
Cirsium scariosum
© 2005 Christopher L. Christie
Cirsium scariosum
© 2015 Richard Spellenberg
Cirsium scariosum var. americanum
Dinnerplate thistle
native
Perennial herb
Cirsium scariosum var. americanum
© 2014 Neal Kramer
Cirsium scariosum var. americanum
© 2013 Robert F Norris
Cirsium scariosum var. americanum
© 2014 Neal Kramer
Cirsium scariosum var. citrinum
Southern meadow thistle
native
Perennial herb
Cirsium scariosum var. citrinum
© 2011 Chris Winchell
Cirsium scariosum var. citrinum
© 2011 Chris Winchell
Cirsium scariosum var. congdonii
Elk thistle
native
Perennial herb
Cirsium scariosum var. congdonii
© 1982 Dean Wm. Taylor
Cirsium scariosum var. congdonii
© 2010 Charles Patterson
Cirsium scariosum var. loncholepis formerly Cirsium loncholepis
La graciosa thistle
rare, native
Perennial herb
Cirsium scariosum var. loncholepis
© 2011 Chris Winchell
Cirsium scariosum var. loncholepis
© 2011 Chris Winchell
Showing records 1 - 50 out of  54 matching records.
    Suggested Citation
    Calflora: Information on California plants for education, research and conservation. [web application]. 2018. Berkeley, California:
    The Calflora Database [a non-profit organization].
    Available: http://www.calflora.org/   (Accessed: Apr 26, 2018).

    The information on this page comes from diverse sources. None of the links are sponsored.

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