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Great ragweed ('''Ambrosia trifida'') Downloaded from : http://plants.usda.gov/cgi_bin/topics.cgi?earl=plant_profile.cgi&symbol=AMTR&photoID=amtr_001_avd.tif {{PD-USGov-USDA}} Credits : This image is not copyrighted and may be freely used for any p
Great ragweed ('''Ambrosia trifida'')

Downloaded from : [[http://plants.usda.gov/cgi_bin/topics.cgi?earl=plant_profile.cgi&symbol=AMTR&photoID=amtr_001_avd.tif]]

{{PD-USGov-USDA}}

Credits : This image is not copyrighted and may be freely used for any purpose. Please credit the artist, original publication if applicable, and the USDA-NRCS PLANTS Database. The following format is suggested and will be appreciated:

USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 3: 341.
[[Category:1913]]


http://commons.wikimedia.org/wiki/Image:Ambrosia-trifida02.jpg
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