[Knotweeds Found East of the Cascade Mts. of Oregon and Washington]

Broadleaf Knotweed, Broad-leaved Knotweed, Leafy Dwarf Knotweed, Zigzag Knotweed

Polygonum minimum

Synonym: Polygonum torreyi

Close-up of a flower subtended by a broad stem leaf of Broadleaf Knotweed, Broad-leaved Knotweed, Leafy Dwarf Knotweed, Zigzag Knotweed: Polygonum minimum (Synonym: Polygonum torreyi)

Broadleaf knotweed as seen along Road #23 at the Mt. Adams Viewpoint about one-half mile south of the intersection with Road 8810, Gifford Pinchot National Forest.........August 8, 2005.

Broadleaf Knotweed, Broad-leaved Knotweed, Leafy Dwarf Knotweed, Zigzag Knotweed: Polygonum minimum (Synonym: Polygonum torreyi)

Broadleaf knotweed as seen along the Umatilla Rim Trail #3080 near Tollgate in the Umatilla N.F........June 24, 2007.

Broadleaf Knotweed, Broad-leaved Knotweed, Leafy Dwarf Knotweed, Zigzag Knotweed: Polygonum minimum (Synonym: Polygonum torreyi) - Broadleaf Knotweed, Broad-leaved Knotweed, Leafy Dwarf Knotweed, Zigzag Knotweed: Polygonum minimum (Synonym: Polygonum torreyi)

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.

Broadleaf Knotweed, Broad-leaved Knotweed, Leafy Dwarf Knotweed, Zigzag Knotweed: Polygonum minimum (Synonym: Polygonum torreyi) - Broad stem leaf of Broadleaf Knotweed, Broad-leaved Knotweed, Leafy Dwarf Knotweed, Zigzag Knotweed: Polygonum minimum (Synonym: Polygonum torreyi) - Flower and stem leaf of Broadleaf Knotweed, Broad-leaved Knotweed, Leafy Dwarf Knotweed, Zigzag Knotweed: Polygonum minimum (Synonym: Polygonum torreyi)


Broadleaf Knotweed, Broad-leaved Knotweed, Leafy Dwarf Knotweed, Zigzag Knotweed: Polygonum minimum (Synonym: Polygonum torreyi)

Broadleaf knotweed seen along the Deadman Canyon Trail #1869 about 1.8 miles north of the trailhead at Fish Lake........August 13, 2018.

Paul Slichter