is an introduced European tree species that is now found in North America. In the US, it is reported from CO, CT, IA, IL, IN, KY, MA, ME, MI, NH, NJ, NY, OH, OR, PA, VA, VT, WA, WI, and, in Canada, it is reported from BC, MB, NB, NS, ON, PE (USDA 2010). In British Columbia, it is found in the southwestern corner of the province, and is well established in the Fraser River delta where it has heavily invaded bogs and is widespread. Like other birches, it hybridizes readily, and can produce hybrid swarms. It is tolerant of acid wet conditions and will grow in brackish water (Klinkenberg, personal observation). The earliest specimen record for this species in the UBC Herbarium is a collection from the Fraser River delta by Vladimir Krajina in 1948, from the Lulu Island Bog.
References: USDA. 2010. Plant profile for Betula pendula. United States Department of Agriculture. Available Online.