Pink Knotweed
Polygonum pensylvanicum
Other Names: Pennsylvania Smartweed, Pinkweed
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Family
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Flower
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- each is ~ 3 mm (1/8 inch), rose or bright pink, sometimes white, and arranged in a thick, upright, elongated, spear-like cluster (1.5-6.5 cm, 0.5-2.5 inches) at the top of a hairy, sticky stem
- often more than 2 clusters on a stem
- no petals, 4-6 petal-like sepals
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Leaf
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- 10-15 cm (4-6 inches)
- shiny, long and lance-shaped
- joints in stem are reddish
- cylindrical sheath without fringes around base where leaf joins the stem
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Location
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- in most parts of North America
- found in gardens, moist places, fields
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Flowering Time
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Other
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- plant is usually 20-120 cm (8 inches - 4 feet)
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Name Origin
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