[Knotweeds and Smartweeds: The Genera Bistorta, Fallopia, Persicaria and Polygonum in the Columbia River Gorge of Oregon and Washington]

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

Polygonum minimum

Synonym: Polygonum torreyi

Broad-leaved knotweed as seen along Road #23 at the Mt. Adams Viewpoint about one-half mile south of the intersection with Road 8810.........August 8, 2005.

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Broadleaf knotweed as seen on Grassy Knoll, Gifford Pinchot National Forest..........June 3, 2014.

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Broad-leaved knotweed as seen along Road #23 at the Mt. Adams Viewpoint about one-half mile south of the intersection with Road 8810.........August 8, 2005

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Paul Slichter