Steironema quadriflorum (Sims) A.S. Hitchcock. Smooth Loosestrife, Four-flowered Loosestrife. Phen: Jun-Sep. Hab: Wet meadows and calcareous fens, stream banks, prairie meadows. Dist: MA, s. ON, MI, and ND south to w. VA, WV, nw. GA, AL, and AR; mainly north and west of the Ohio River, very rare and scattered in or east of the Appalachians. Reported for c. NC by Coffey & Jones (1980), based on 2 specimens; the records seem unlikely.

Origin/Endemic status: Native

Synonymy: = Il; = Lysimachia quadriflora Sims – Ar, C, F, FNA8, GrPl, K1, K3, K4, Mi, NE, NY, Pa, Tn, Va, W, WV, Coffey & Jones (1980), Estes, Shaw, & Mausert-Mooney (2015); = n/a – RAB; = Steironema quadriflora (Sims) Hitchc. – G

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: OBL (name change)
• Eastern Mountains and Piedmont: FACW (name change)
• Great Plains: FACW (name change)
• Midwest: OBL (name change)
• Northcentral & Northeast: OBL (name change)

Heliophily: 8