Persicaria lapathifolia (Linnaeus) Delarbre. Section: Persicaria. Willow-weed, Dockleaf Smartweed, Pale Smartweed. Phen: Jun-Dec. Hab: Bottomlands, bottomland fields, disturbed areas. Dist: Nearly cosmopolitan in current distribution, the original distributions hard to interpret, sometimes regarded as having both native and introduced elements in North America.

Origin/Endemic status: Native

Synonymy: = Ar, Fl4, FNA5, Il, K3, K4, Mi, NE, NY, Pa, S, Tn, Tx, Va, Atha, Nee, & Naczi (2010); = Polygonum lapathifolium L. – C, GW2, K1, NcTx, RAB, W, WH3, WV, Horton (1972), Mitchell & Dean (1978); > Polygonum lapathifolium L. var. lapathifolium – F, G; > Polygonum lapathifolium L. var. nodosum (Raf.) Weinm. – G; > Polygonum lapathifolium L. var. ovatum A.Braun – F; > Polygonum lapathifolium L. var. prostratum Wimm. – F; > Polygonum lapathifolium L. var. salicifolium Sibth. – F; > Polygonum scabrum Moench – F

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