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Persicaria amphibia; Smartweed, Swamp Knotweed   

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Persicaria amphibia
Persicaria amphibia
Smartweed, Swamp Knotweed
Photographer: Tom Annese

ID: 0000 0000 0903 0182 (2003-09-10)

Copyright © 2003 Tom Annese

 
INFORMATION PROVIDED WITH THE PHOTO
  • date of photo  Sep 2003
  • location   Lake Merced (San Francisco County, California, US)
  • family Polygonaceae
  • synonyms Polygonum amphibium var. emersum
  • plant community   Emergent
  • notes   Listed as a 'noxious weed' in 1993 Jepson. That may change in new addition. P. amphibium ssp. emersum does form dense thickets around Lake Merced.
  • camera   Minolta Xt
  • photo category: Plant - annual/perennial

  • ADDITIONAL TAXONOMIC NOTES FOR THIS PHOTO
  • name change notes   May 21, 2014: TJM1 name Polygonum amphibium var. emersum changed to TJM2 name Persicaria amphibia . (University & Jepson Herbaria)

  • MORE INFORMATION ABOUT THIS PLANT
  • common names   Smartweed, Swamp Knotweed (photographer)
  • Look for Jepson Manual treatments, maps (University & Jepson Herbaria)
  • View Calflora record for Persicaria amphibia
  • View all photos in CalPhotos of Persicaria amphibia
  • Check Google Images for Persicaria amphibia


  • The photographer's identification Persicaria amphibia has not been reviewed. Click here to review or comment on the identification.

     
    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 © 2003 Tom Annese. For other uses, or if you have questions, contact Tom Annese tomannese[AT]yahoo.com. (Replace the [AT] with the @ symbol before sending an email.)


     

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