Persicaria amphibia

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Scientific Name Persicaria amphibia (Polygonum amphibium) USDA PLANTS Symbol POAME
Common Name Water Knotweed, Water Smartweed ITIS Taxonomic Serial No. 823854
Family Polygonaceae (Buckwheat) SEINet
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Description Life zones and habitat: Foothills and montane life zones; lake edges; amphibious plant may occur in water or on land in wet areas.
Plant: Terrestrial plants with erect to decumbent and densely hairy stems and leaves with sharp-pointed tipped leaf blades; aquatic plants stems hairless, blunt-tipped leaves.
Leaves: Alternate, ovate-lanceolate to elliptic, leathery green stem leaves with tips as above; 3/4 to 6 inches long and 3/8 to 2-3/8 inches wide.
Inflorescence: Terminal racemes 3/8 to 6 inches long of many small flowers with bright pink to red tepals.
Bloom Period: Summer.
References: "Flora of Colorado" by Jennifer Ackerfield and US Forest Service article by Walter Fertig.
BONAP Distribution Map

Colorado Status:

© Tom Lebsack 2021