Henry W. Coe - Wildflower Guide

Water Knotweed, Smart Knotweed, Water Smartweed

Scientific Name: Persicaria amphibia
Family: Buckwheat Family (Polygonaceae)
Blooms: July through October
Facts: Perennial, rhizomed or stoloned. Shallow lakes, streams, shores.


Photos by Sue Dekalb © 2015
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