August 13,   Borderland Park, Easton
Often times people take this innocent native plant for its invasive relative, purple loosestrife, and try to get rid of it. Swamp loosestrife is semi-woody, its flowers in axils of leaf whorls all along the arching stems, clusters far away from each other. Purple loosestrife is herbaceous, upright, its flowers only in axils of upper leaf whorls, forming somewhat interrupted, but compact spikes.