Persicaria meisneriana (Chamisso & Schlechtendal) M. Gómez var. beyrichiana (Chamisso & Schlechtendal) C.C. Freeman. Section: Echinocaulon. Mexican Tearthumb. Hab: Wet savannas, blackwater river floodplains, ditches; sometimes considered only introduced in southeastern North America, but probably native. Dist: E. SC south to FL, west to LA; Mexico (CHP, VER) and Central America south to n. South America; Brazil; se. Africa. Reported for Mobile County, AL (Barger et al. 2023).
Origin/Endemic status: Native
Taxonomy Comments: See Mitchell (1970) and Freeman (2004).
Synonymy: = Fl4, FNA5, K3, K4; = n/a – C, RAB; = Polygonum meisnerianum Cham. & Schltdl. var. beyrichianum (Cham. & Schltdl.) Meisn. – GW2, K1, WH3; < Polygonum meisnerianum Cham. & Schltdl. – Mex, Tx, Horton (1972); < Truellum meisnerianum (Cham. & Schltdl.) Soják
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