Polygonum persicaria Polygonum persicaria Leaf Inflorescence Photo credit Steve Dewey, Utah State University
Polygonum persicaria Polygonum persicaria Leaf Stem Photo credit Steve Manning, Invasive Plant Control
Polygonum persicaria Polygonum persicaria Stem Photo credit Joseph M. DiTomaso, University of California - Davis
Asclepias syriaca - inflorescence Asclepias syriaca - inflorescence Inflorescence Photo credit Grant Thompson
Asclepias syriaca - whole plant with seedpods Asclepias syriaca - whole plant with seedpods Whole plant Seed Inflorescence
Asclepias syrica - whole plant Asclepias syrica - whole plant Whole plant Photo credit Grant Thompson
Hypochaeris radicata Hypochaeris radicata Stem Inflorescence Photo credit Ohio State Weed Lab Archive
Euphoriba humistrata Euphoriba humistrata Leaf Inflorescence Photo credit Utah State University Archive
Euphoriba humistrata Euphoriba humistrata Whole plant Leaf Stem Photo credit Bruce Ackley, Ohio State University
Ligustrum obtusifolium Ligustrum obtusifolium Leaf Inflorescence Photo credit Leslie J. Mehrhoff, University of Connecticut
Ligustrum obtusifolium Ligustrum obtusifolium Whole plant Leaf Stem Inflorescence Photo credit Leslie J. Hehrhoff, University of Connecticut
Polygonum aviculare - invading sidewalk edge Polygonum aviculare - invading sidewalk edge Whole plant