Steironema hybridum (Michaux) Rafinesque ex B.D. Jackson. Lowland Loosestrife. Phen: May-Sep; Sep-Oct. Hab: Mesic hardwood forests, sinkhole and depression ponds, wet meadows, other wet areas. Dist: ME and s. QC west to AB and WA, south irregularly to ne. FL, Panhandle FL, AR, NE, and AZ.

Origin/Endemic status: Native

Synonymy: = G, Il, S; = Lysimachia hybrida Michx. – Ar, C, F, FNA8, GrPl, K1, K3, K4, Mi, NE, NY, Pa, Tn, Va, W, WV, Coffey & Jones (1980), Estes, Shaw, & Mausert-Mooney (2015); = Lysimachia lanceolata Walter var. hybrida (Michx.) A.Gray – GW2, RAB, WH3; < Lysimachia hybrida Michx. – Fl5

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