Betula pumila Linnaeus. Bog Birch. Phen: May-Jun. Hab: Fens, swamps, bogs. Dist: NL west to AK, south to nw. NJ, e. OH, sw. OH, n. IN, n. IL, ne. IA, ND, MT, and OR.

Origin/Endemic status: Native

Taxonomy Comments: A tetraploid species (2n=4x=56).

Synonymy: = FNA3, K3, K4, Mi, NE, NY, Furlow (1990); > Betula pumila L. – G; > Betula pumila L. var. glabra Regel – F, Il; > Betula pumila L. var. glandulifera (Regel) Gleason – C, F, G, GrPl, Il; > Betula pumila L. var. pumila – F, Il; > Betula pumila L. var. renifolia Fernald – F

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