Dwarf Birch, Bog Birch, Resin Birch, Scrub Birch, Swamp Birch Betula glandulosa (Synonyms: Betula crenata, Betula glandulosa var. glandulosa, Betula terrae-novae) -
Red Birch, River Birch, Water Birch: Betula occidentalis (Synonyms: Betula beeniana, Betula fontinalis, Betula fontinalis var. inopina, Betula microphylla var. fontinalis, Betula occidentalis var. fecunda, Betula occidentalis var. inopina, Betula occidentalis var. occidentalis, Betula papyrifera ssp. occidentalis, Betula papyrifera var. occidentalis) -
Bog Birch, Dwarf Birch, Swamp Birch: Betula pumila (Synonyms: Betula borealis, Betula glandulifera, Betula glandulosa var. glandulifera, Betula glandulosa var. hallii, Betula nana var. glandulifera, Betula pubescens ssp. borealis, Betula pumilahallii, Betula pumila var. glabra, Betula pumila var. glandulifera, Betula pumila var. renifolia) -