Eupatorium semiserratum A.P. de Candolle. Phen: Late Jul-Oct. Hab: Swamp forests, seepage bogs, savannas, clay-based Carolina bays, other wetlands. Dist: Se. VA south to ne. FL, Panhandle FL, west to TX and AR; disjunct in sc. TN.

ID notes:This species often has 3 leaves per node; most similar species rarely or never have whorled leaves.

Origin/Endemic status: Endemic

Synonymy: = Ar, C, Fl7, FNA21, G, GW2, K1, K3, K4, RAB, S, SE1, Tn, Va, WH3; = Eupatorium cuneifolium Willd. var. semiserratum (DC.) Fernald & Griscom – F; < Eupatorium glaucescens Elliott – Tx

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