[Knotweeds: The Genus Polygonum West of the Cascade Mts. of Oregon and Washington]

Unlabeled photos on this page were taken along Road #23 at the Mt. Adams Viewpoint about one-half mile south of the intersection with Road 8810..........August 8, 2005.

The photo above shows broadleaf knotweed as seen along the Umatilla Rim Trail #3080 near Tollgate in the Umatilla N.F..........June 24, 2007.

Broadleaf knotweed observed along the Pacific Crest Trail #2000 on the south side of Cook and Green Peak, Klamath National Forest......July 14, 2020.

Broadleaf knotweed growing on the cut bank along the North Loop Road about one mile downhill from the Kiger Gorge Overlook, Steens Mountain, Harney County, Oregon.........August 31, 2011.