Micranthes pensylvanica (Linnaeus) Haworth. Section: Micranthes. Swamp Saxifrage. Phen: Apr-Jun. Hab: Forested seeps and seepage swamps, fens, usually over mafic or calcareous rocks. Dist: ME west to MN, south to e. VA, c. and w. NC, and IA.

Origin/Endemic status: Native

Synonymy: = Il, Mi; = n/a – S, S13; = Saxifraga pensylvanica L. – F; = Saxifraga pensylvanica L. ssp. pensylvanica – G; < Micranthes pensylvanica (L.) Haw. – FNA8, K3, K4, NE, NY, Tn, Va, Brouillet & Gornall (2007), Tkach, Röser, & Hoffmann (2015); < Saxifraga pensylvanica L. – C, K1, Pa, RAB, Tat, W, WV

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: OBL
• Eastern Mountains and Piedmont: OBL (taxonomic split from wetland indicator species)
• Great Plains: FACW (taxonomic split from wetland indicator species)
• Midwest: OBL (taxonomic split from wetland indicator species)
• Northcentral & Northeast: OBL (taxonomic split from wetland indicator species)

Heliophily: 4