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Photographer: Emmet J. Judziewicz
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Family Polygonaceae
Persicaria pensylvanica (L.) M.Gómez
Pennsylvania knotweed, Pennsylvania smartweed, pinkweed
Persicaria: peach-like, the medieval name for knotweed
pensylvanica: of Pennsylvania
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| Status: | Native |
| Plant: | erect, annual, 2'-6' tall forb with many branches; stems nodes becoming jagged but not bristly; taprooted |
| Flower: | white to pink, 5-parted, petals and petal-like sepals connected at the base; inflorescence of many 1/2" - 2" long, erect, robust, cylindrical, blunt, spike-like clusters on stalks jointed at the top; blooms July-Sept. |
| Fruit: | dry seed concave on both sides |
| Leaf: | alternate, lance-like, up to 1 3/4" wide |
| Habitat: | wet to moist; disturbed sites; in rich soil |
| (Glossary) |
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