Betula alba var. commutata Betula alba var. papyrifera Betula davurica var. americana Betula excelsa Betula grandis Betula latifolia Betula papyrifera var. lyalliana Betula montanensis Betula neoalaskana var. kenaica Betula papyracea Betula papyrifera var. commutata Betula papyrifera subsp. commutata Betula papyrifera var. elobata Betula papyrifera var. kenaica Betula papyrifera subsp. kenaica Betula papyrifera var. macrostachya Betula papyrifera var. papyrifera Betula papyrifera var. pensilis Betula papyrifera var. subcordata Betula papyrifera subsp. subcordata Betula pirifolia Betula alba var. elobata Betula alba subsp. papyrifera Betula lenta var. papyrifera Betula papyracea var. grandis Betula papyrifera var. andrewsii Betula papyrifera var. communis Betula papyrifera f. coriacea Betula papyrifera f. elobata Betula papyrifera f. longipes Betula papyrifera var. montanensis Betula papyrifera f. nana Betula alba subsp. latifolia Betula lyalliana Betula papyracea var. communis Betula papyracea var. lyalliana Betula papyrifera f. papyrifera Betula alba var. communis Betula excelsa Betula alba subsp. excelsa Betula kenaica Betula subcordata Betula kamtschatica var. kenaica Betula papyrifera var. recessa Betula alba lus. latifolia
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024