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Swamp Smartweed (Polygonum amphibium)
Image ID: yrt159L
Other common names: Water Knotweed
Family: Polygonaceae (Buckwheat)
Height: 2 to 3 ft.
Blooms: July to September
Leaf Type: smooth
Bloom Size: 0.125 in. (typical)
Flower Description: Elongate clusters, Irregular blossoms
Location: Youghiogheny River Trail
More photos of this flower
Swamp Smartweed may be easily confused with:
- Lady's Thumb
Lady's thumb has a distinctive triangular marking on the leaf. Swamp smartweed typically has a longer flower cluster and a larger leaf.
- Pennsylvania Smartweed
Swamp smartweed typically has a longer flower cluster and a larger leaf. Smartweeds are difficult to tell apart.
We started out as wildflowers from the bicycle trails of western Pennsylvania, but we've grown!
Meyer, Joseph E. (1918). The Herbalist and Herb Doctor. Hammond, Ind.: Indiana Herb Gardens. 400 pp.