ACIS Photos / Imgf5063
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Imgf5063.jpg
silversheath
knotweed
Polygonum argyrocoleon Steud.
Issued in furtherance of Cooperative Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture, James A. Christenson, Director Cooperative Extension, College of Agriculture and Life Sciences, The University of Arizona.
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