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Polygonum aviculare ssp. depressum; Common Knotweed   

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Polygonum aviculare ssp. depressum
Polygonum aviculare ssp. depressum
Common Knotweed
Photographer: Douglas Barbe
Organization: California Dept. of Food & Agriculture, Botany Laboratory
Collection: CDFA

ID: 0175 3301 2363 0057 (2001-07-18)

Copyright © 2001 CDFA

 
INFORMATION PROVIDED WITH THE PHOTO
  • date of photo  Jul 2, 1978
  • location   Dogtown, Marin County (Marin County, California, US)
  • family Polygonaceae
  • synonyms Polygonum arenastrum
  • photo category: Plant - annual/perennial

  • ADDITIONAL TAXONOMIC NOTES FOR THIS PHOTO
  • name change notes   May 21, 2014: TJM1 name Polygonum arenastrum changed to TJM2 name Polygonum aviculare ssp. depressum . (University & Jepson Herbaria)

  • MORE INFORMATION ABOUT THIS PLANT
  • common names   Common Knotweed, Doorweed, Matweed, Oval-leaf Knotweed, Ovalleaf Knotweed, Prostrate Knotweed (ITIS )
  • Look for Jepson Manual treatments, maps (University & Jepson Herbaria)
  • View Calflora record for Polygonum aviculare ssp. depressum
  • View all photos in CalPhotos of Polygonum aviculare ssp. depressum
  • Check Google Images for Polygonum aviculare ssp. depressum


  • Reviewers' comments about this photo (review or add another comment)
    1. Reviewed by Staff CDFA    Jul 18, 2001

    Action: ID confirmed

    Reviewer's comments:
         "This slide is from a collection at the California Department of Food and Agriculture, which is reviewed and maintained by CDFA Staff."

    2. Reviewed by Fred Hrusa    Jul 11, 2005

    Action: changed name from "Piptochaetium setosum" to "Polygonum arenastrum "

    Reviewer's comments:
         "Error in original data entry - - plant is clearly misidentified."

     
    Using this photo   The thumbnail photo (128x192 pixels) on this page may be freely used for personal or academic purposes without prior permission under the Fair Use provisions of US copyright law as long as the photo is clearly credited with © 2001 CDFA. For other uses, or if you have questions, contact Genevieve Walden Genevieve.Walden[AT]cdfa.ca.gov. (Replace the [AT] with the @ symbol before sending an email.)


     

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