Ranunculus caricetorum Greene. Subgenus: Ranunculus. Section: Polyanthemos. Northern Swamp Buttercup, Marsh Buttercup. Phen: Apr-Aug. Hab: Swampy forests and marshes. Dist: NB west to s. MB, south to NJ, n. VA, s. OH, and s. MO; reports of this species farther south are probably in error.
Origin/Endemic status: Native
Taxonomy Comments: This species is octoploid (n = 32); the remainder of the R. hispidus complex is tetraploid.
Synonymy: = NE, NY, Va, Haines (2007b); = Ranunculus hispidus Michx. var. caricetorum (Greene) T.Duncan – C, FNA3, GrPl, K1, K3, K4, Mi, Pa, Duncan (1980); = Ranunculus septentrionalis Poir. in Lam. – GW2, W, Keener (1976), misapplied; > Ranunculus septentrionalis Poir. in Lam. var. caricetorum (Greene) Fernald – F, G, Il; > Ranunculus septentrionalis Poir. var. pterocarpus L.D.Benson – G; > Ranunculus septentrionalis Poir. in Lam. var. septentrionalis – F, G, Il
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