| Description | Pennsylvania Smartweed (Polygonum pensylvanicum) is a weedy member of the Knotweed or Smartweed group of plants. |
|---|---|
| Plant Type | All Plants, Weeds |
| Sunlight | full |
| Moisture | moist, damp |
| Soil & Site | moist |
| Flowers | rose pink to light pink, globular, found in dense erect spikes, look like they are knotted together, hence the name "Knotweed" |
| Leaves | Lanceolate leaves, ovate, alternate, sheaths lack fringes and swollen nodes where the petiole attachés to the stem. The swollen nodes look like knees; hence one of the common names "Many Knees". |
| Dimensions | up too 1.2 meters, An erect growing plant. |
| Propagation | seeds |
| Native Site | eastern and central United States |
| Misc Facts | This plant looks a lot like the "lady's Thumb (Polygonum persicaria), except this plant lacks the fringes on the stem sheaths. |
| Notes & Reference | #07-Newcomb's Wildflower Guide (Newcomb), #08-Peterson's Guide to Wild Flowers (Peterson McKenny),#19-Common Weeds (USDA Agricultural Research Service), #49-The History and Folklore of North American Wildflowers (Timothy Coffey) |
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