Persicaria hydropiperoidesHannah Marx·Follow1 min read·Jan 20, 2017--Shareswamp smartweed (Polygonaceae)status = native | chromosome number = NAPersicaria hydropiperoides, collected at Harvard Forest July 2016Plants Profile for Polygonum hydropiperoides (swamp smartweed)Polygonum hydropiperoides Michx. swamp smartweedplants.usda.gov