Plant Search - Calflora

Click on the Scientific Name to see a Taxon Report.


Cirsium andersonii
Anderson's thistle native Perennial herb	© 2019 Bob Sweatt	© 2006 Steve Matson CalPhotos (UCB)	© 2012 Paul Preston and Tim Lukaszewski
Cirsium andrewsii
Franciscan thistle rare, native Perennial herb	© 2011 Thomas Reyes CalPhotos (UCB)	© 2013 Robert Sikora CalPhotos (UCB)	© 2011 Thomas Reyes CalPhotos (UCB)
Cirsium arizonicum
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
Arizona thistle native Perennial herb	© 2012 Dylan Neubauer CalPhotos (UCB)	© 2017 Neal Kramer CalPhotos (UCB)	© 2016 Steve Matson CalPhotos (UCB)
Cirsium arizonicum var. tenuisectum
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
Canada thistle invasive non-native Perennial herb	© 2008 Keir Morse CalPhotos (UCB)	© 2018 Joel Trumbo	© 2007 Luigi Rignanese CalPhotos (UCB)
Cirsium brevistylum
Indian thistle native Perennial herb	© 2007 Neal Kramer CalPhotos (UCB)	© 2014 Margo Bors CalPhotos (UCB)	© 2018 Brian Charles
Cirsium canescens
Prairie thistle non-native Perennial herb	© 2010 Lee Dittmann CalPhotos (UCB)	© 2008 Zoya Akulova CalPhotos (UCB)
Cirsium ciliolatum
Ashland thistle rare, native Perennial herb	© 2017 Gerald Carr	© 2017 Gerald Carr	© 2017 Gerald Carr
Cirsium crassicaule
Slough thistle rare, native Annual, Perennial herb	© 2020 Steve Laymon	© 2020 Steve Laymon	© 2020 Steve Laymon
Cirsium cymosum
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
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
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
Brewer's swamp thistle native Perennial herb	© 2019 Julie Kierstead Nelson	© 2010 John Dittes CalPhotos (UCB)	© 2019 Julie A. Kierstead
Cirsium douglasii var. douglasii
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	© 2019 David Greenberger	© 2020 R.A. Chasey	© 2020 R.A. Chasey
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
Suisun thistle native Perennial herb	© 2010 Doug Wirtz CalPhotos (UCB)	© 2011 Thomas Reyes CalPhotos (UCB)	© 2010 Doug Wirtz CalPhotos (UCB)
Cirsium hydrophilum var. hydrophilum
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
Mt. Tamalpais thistle rare, native Perennial herb	© 2018 Eliezer Margolis	© 2011 Vernon Smith CalPhotos (UCB)	© 2019 Claire Mallen
Cirsium inamoenum
Greene's thistle native Perennial herb	© 2013 Barry Breckling CalPhotos (UCB)	© 2020 Bob Sweatt	© 2020 Bob Sweatt
Cirsium inamoenum var. inamoenum
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
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
California thistle native Perennial herb	© 2021 Amber Bedgood	© 2013 James Gonsman	© 2021 Mike Russler
Cirsium occidentale var. candidissimum
Snowy thistle native Perennial herb	© 2020 R.A. Chasey	© 2019 Matt Berger	© 2018 Debra Valov
Cirsium occidentale var. compactum
Compact cobwebby thistle rare, native Perennial herb	© 2019 Marisa Persaud	© 2016 Talila Golan	© 2011 Chris Winchell CalPhotos (UCB)
Cirsium occidentale var. coulteri
Coulter's thistle native Perennial herb	no photo
Cirsium occidentale var. lucianum
Cuesta ridge thistle rare, native Perennial herb	© 2019 David Greenberger	© 2009 Zachary Green CalPhotos (UCB)	© 2011 Chris Winchell CalPhotos (UCB)
Cirsium occidentale var. occidentale
Cobweb thistle native Perennial herb	© 2018 Ken Hickman	© 2009 John W. Wall CalPhotos (UCB)	© 2009 Neal Kramer CalPhotos (UCB)
Cirsium occidentale var. venustum
Venus thistle native Perennial herb	© 2019 Sue Graue	© 2004 David A. Tharp CalPhotos (UCB)	© 2020 Sara Timby
Cirsium ochrocentrum
Beaumont thistle non-native Perennial herb	© 2004 Robert Sivinski CalPhotos (UCB)	© 2001 CDFA CalPhotos (UCB)
Cirsium ochrocentrum var. ochrocentrum
Yellowspine thistle non-native Perennial herb	© 2016 Wynn Anderson CalPhotos (UCB)
Cirsium praeteriens
Palo alto thistle rare, native Perennial herb	no photo
Cirsium quercetorum
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
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
Rough thistle non-native Perennial herb	no photo
Cirsium scariosum
Elk thistle native Perennial herb	© 2020 Bob Sweatt	© 2016 Julie Kierstead Nelson	© 2020 Bob Sweatt
Cirsium scariosum var. americanum
Dinnerplate thistle native Perennial herb	© 2020 Bob Sweatt	© 2014 Neal Kramer CalPhotos (UCB)	© 2013 Robert F Norris CalPhotos (UCB)
Cirsium scariosum var. citrinum
Southern meadow thistle native Perennial herb	no photo
Cirsium scariosum var. congdonii
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
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)