Rorippa palustris (Linnaeus) Besser ssp. palustris . Marshcress. Phen: (Mar-) May-Oct. Hab: Marshes, bogs, seeps. Dist: ME and NB west to SK, south to FL, TX, ID, and n. South America.

Origin/Endemic status: Native

Synonymy: = FNA7, K3, K4, Mi, NY, Va; = Radicula palustris (L.) Moench – S; = Roripa palustris (L.) Besser – S13; = Rorippa islandica (Oeder ex Murray) Borbás – RAB, misapplied; = Rorippa palustris (L.) Besser var. palustris – NE; > Rorippa islandica (Oeder ex Murray) Borbás var. fernaldiana Butters & Abbe – F, G, WV, misapplied; > Rorippa islandica (Oeder ex Murray) Borbás var. islandica – F, G, Tx, misapplied; > Rorippa islandica var. microcarpa (Regel) Fernald – Tat; < Rorippa palustris (L.) Besser – Fl4, GW2, Pa, W, WH3; > Rorippa palustris (L.) Besser ssp. fernaldiana (Butters & Abbe) Jonsell – K1, NcTx, Tn, Al-Shehbaz (1988a); > Rorippa palustris (L.) Besser ssp. glabra (O.E.Schulz) Stuckey var. fernaldiana (Butters & Abbe) Stuckey – GrPl, Stuckey (1972); > Rorippa palustris (L.) Besser ssp. palustris – Al-Shehbaz (1988a); > Rorippa palustris (L.) Besser ssp. palustris var. palustris – Stuckey (1972); > Rorippa palustris (L.) Besser var. fernaldiana (Butters & Abbe) Stuckey – Ar, C, Il, Rollins (1993); > Rorippa palustris (L.) Besser var. palustris – C, Il, Rollins (1993)

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Wetland Indicator Status:

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

Heliophily ?: 7