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common knotweed - Photo (c) John Hilty, some rights reserved (CC BY-NC)
beardendb's ID: common knotweed (Polygonum arenastrum)
Posted by beardendb over 4 years ago (Flag)
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Japanese Knotweed - Photo (c) Anita, some rights reserved (CC BY-NC-SA)
richard_olmstead's ID: Japanese Knotweed (Polygonum cuspidatum [inactive]) (inactive taxon)

This is Japanese knotweed, a serious invasive plant in the Puget Sound region. Fallopia japonica is a synonym sometimes used for this species.

Posted by richard_olmstead over 4 years ago (Flag)
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Japanese Knotweed - Photo (c) marie, some rights reserved (CC BY), uploaded by Marie Studer
richard_olmstead's ID: Japanese Knotweed (Fallopia japonica) Added as part of a taxon swap
Posted by richard_olmstead over 3 years ago (Flag)
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common knotweed - Photo (c) John Hilty, some rights reserved (CC BY-NC)
beardendb's ID: common knotweed (Polygonum arenastrum)
Knotweeds and Allies - Photo (c) Dinesh Valke, some rights reserved (CC BY-NC-ND)
Community ID: Knotweeds and Allies (Family Polygonaceae)
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Japanese Knotweed - Photo (c) marie, some rights reserved (CC BY), uploaded by Marie Studer
richard_olmstead's ID: Japanese Knotweed (Fallopia japonica) Added as part of a taxon swap
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