Persicaria arifolia (Linnaeus) Haraldson. Section: Echinocaulon. Halberd-leaf Tearthumb. Phen: Jul-Nov; Aug-Dec. Hab: Marshes, wet thickets. Dist: NS west to MN. south to se. GA, ne. FL (Slaughter 2014; Franck et al. 2016), w. NC, and w. TN.

Origin/Endemic status: Native

Synonymy: = FNA5, K3, K4, Mi, NE, NY, Pa, Tn, Va; = Polygonum arifolium L. – C, GW2, K1, RAB, W, WV, Horton (1972), Mitchell & Dean (1978), Park (1988); = Tracaulon arifolium (L.) Raf. – S; = Truellum arifolium (L.) Soják; > Polygonum arifolium L. var. arifolium – F, G; > Polygonum arifolium L. var. pubescens (R.Keller) Fernald – F, G; > Tracaulon arifolium (L.) Raf. var. pubescens (Keller) Mohlenbr. – Il

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