Polygonum arenastrum Doorweed, Common Knotweed ID: 0000 0000 1209 1353 [detail] © 2009 Barry Breckling	Polygonum arenastrum Doorweed, Common Knotweed ID: 0000 0000 1209 1356 [detail] © 2009 Barry Breckling	Polygonum arenastrum Doorweed, Common Knotweed ID: 0000 0000 1209 1357 [detail] © 2009 Barry Breckling	Polygonum arenastrum Doorweed, Common Knotweed ID: 0000 0000 1209 1360 [detail] © 2009 Barry Breckling
Polygonum arenastrum ID: 0000 0000 0910 1857 [detail] © 2010 Michael O'Brien	Polygonum arenastrum Doorweed, Common Knotweed ID: 0000 0000 1010 1192 [detail] © 2010 Barry Breckling	Polygonum arenastrum Equal-leaved Knotgrass ID: 0000 0000 0815 2604 [detail] © 2015 Phil Pullen	Polygonum arenastrum Equal-leaved Knotgrass ID: 0000 0000 0815 2606 [detail] © 2015 Phil Pullen

Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos.