Calflora: Plant Search

Click on the Scientific Name to see a Taxon Report.


Polygonum argyrocoleon
Silver sheath knotweed non-native Annual herb	© 2017 Neal Kramer	© 2018 Ron Vanderhoff	© 2017 Neal Kramer
Polygonum austiniae
Rebecca austin's knotweed native Annual herb	© 2019 Gerald Carr	© 2019 Gerald Carr	© 2019 Gerald Carr
Polygonum aviculare
Prostrate knotweed non-native Annual, Perennial herb	© 2016 John Doyen	© 2008 Keir Morse	© 2010 Lee Dittmann
Polygonum aviculare ssp. aviculare
Prostrate knotweed non-native Annual, Perennial herb	no photo
Polygonum aviculare ssp. buxiforme
Prostrate knotweed non-native Annual, Perennial herb	no photo
Polygonum aviculare ssp. depressum
Prostrate knotweed non-native Annual, Perennial herb	© 2016 Barbara Boethling	© 2009 Barry Breckling	© 2014 Richard Chasey
Polygonum aviculare ssp. neglectum
Prostrate knotweed non-native Annual, Perennial herb	no photo
Polygonum aviculare ssp. rurivagum
Prostrate knotweed non-native Annual, Perennial herb	© 2008 Doreen L. Smith
Polygonum bidwelliae
Bidwell's knotweed rare, native Annual herb	© 2010 George W. Hartwell	© 2019 David popp	© 2020 David popp
Polygonum bolanderi
Bolander's polygonum native Perennial herb	© 2008 John Dittes	© 2008 John Dittes	© 2015 Dana York
Polygonum californicum
California knotweed native Annual herb	© 2015 John Doyen	© 2004 Steve Matson	© 2015 John Doyen
Polygonum douglasii
Douglas' knotweed native Annual herb	© 2016 Judy and Barry Breckling	© 2009 Barry Breckling	© 2009 Barry Breckling
Polygonum fowleri
Fowler's knotweed native Annual herb	© 2015 Ryan Batten	© © 2015 Ryan Batten	© 2015 Ryan Batten
Polygonum fowleri ssp. fowleri
Fowler knotweed native Annual herb	no photo
Polygonum hickmanii
Hickman's knotweed rare, native Annual herb	© 2006 California Department of Fish and Game	© 2006 California Department of Fish and Game
Polygonum majus
Large douglas' knotweed native Annual herb	© 2008 Keir Morse	© 2008 Keir Morse	© 2008 Keir Morse
Polygonum marinense
Marin knotweed rare, native Annual herb	© 2013 Robert Sikora	© 2001 Doreen L. Smith	© 2014 John Doyen
Polygonum minimum
Little mountain knotweed native Annual herb	© 2009 Neal Kramer	© 2008 Steve Matson	© 2011 Steve Matson
Polygonum multiflorum
Tuber fleeceflower non-native Vine	© 2001 CDFA	© 2001 CDFA
Polygonum paronychia
Dune knotweed native Perennial herb	© 2020 Melissa Mooney	© 2014 James Gonsman	© 2017 Adam Chasey
Polygonum parryi
Parry's knotweed native Annual herb	© 2019 Belinda Lo	© 2020 Belinda Lo	© 2019 Dean Wm. Taylor
Polygonum polygaloides
Milkwort knotweed native Annual herb	© 2009 Keir Morse	© 2008 Keir Morse	© 2006 Debra Valov
Polygonum polygaloides ssp. confertiflorum
Dense knotweed native Annual herb	© 2008 Keir Morse	© 2008 Keir Morse	© 2011 Barry Breckling
Polygonum polygaloides ssp. esotericum		also called Polygonum esotericum
Modoc county knotweed rare, native Annual herb	© 2013 Jake Ruygt	© 2000 Robert E. Preston, Ph.D.	© 2013 Jake Ruygt
Polygonum polygaloides ssp. kelloggii
Kellogg's knotweed native Annual herb	© 2010 Steve Matson	© 2019 Chico Hiking Association	© 2009 Keir Morse
Polygonum ramosissimum
Yellow knotweed non-native Annual herb	© 2015 Daniel Boone	© 2015 Daniel Boone	© 2015 Daniel Boone
Polygonum ramosissimum ssp. prolificum
Bushy knotweed non-native Annual herb	no photo
Polygonum ramosissimum ssp. ramosissimum
Yellow knotweed native Annual herb	no photo
Polygonum sawatchense
Knotweed native Annual herb	© 2009 Barry Breckling	© 2012 Dean Wm. Taylor. Ph. D.	© 2009 Barry Breckling
Polygonum sawatchense ssp. oblivium
Knotweed native Annual, Perennial herb	© 2012 Dean Wm. Taylor. Ph. D.
Polygonum sawatchense ssp. sawatchense		also called Polygonum douglasii ssp. johnstonii
native Annual, Perennial herb	© 2009 Barry Breckling	© 2019 Susan McDougall	© 2009 Barry Breckling
Polygonum shastense
Shasta knotweed native Perennial herb	© 2003 Penn Martin II	© 2018 Chico Hiking Association	© 2018 Matt Berger
Polygonum spergulariiforme
Spurry knotweed native Annual herb	© 2008 Sierra Pacific Industries	© 2008 Sierra Pacific Industries	© 2008 Sierra Pacific Industries