Persicaria densiflora (Meisner) Moldenke. Section: Persicaria. Dense-flower Smartweed. Phen: Jun-Oct. Hab: Swamp forests. Dist: The Persicaria glabra complex is widespread in the Neotropics, in North America north to s. NJ, VA, KY, MO, and TX. The distribution of Persicaria densiflora is unclear.

Origin/Endemic status: Native

Taxonomy Comments: Persicaria densiflora, the American component of the pantropical Persicaria glabra complex, seems to warrant recognition.

Synonymy: = Tx; = Persicaria portoricensis (Bertero ex Small) Small – S, illegitimate name; = Polygonum densiflorum Meisn. – Bah, C, F, G, GW2, K1, NcTx, RAB, WH3, Horton (1972); < Persicaria glabra (Willd.) M.Gómez – Ar, FNA5, Il, K3, K4, Mex, Pa, Tn, Va

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