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	Betulaceae Gray Nat. Arr. Brit. Pl. 2: 222, 243. 1822. (10 Jan 1822) Status:Accepted Name Rank:Family Family: Betulaceae Order: Fagales
	Alnus Mill. Gard. Dict. Abr., ed. 4. : [s.p.] (1754) Status:Accepted Name Rank:Genus Family: Betulaceae Order: Fagales
	Corylus L. Sp. Pl. : 998 (1753) Status:Accepted Name Rank:Genus Family: Betulaceae Order: Fagales
	Ostrya knowltonii Sarg. Gard. & Forest vii. 115. 1894 Status:Accepted Name Rank:Species Family: Betulaceae Order: Fagales
	Ostrya chisosensis Correll Wrightia 3: 128 (1965) Status:Synonym of Ostrya knowltonii Coville Rank:Species Family: Betulaceae
	Betula L. Sp. Pl. : 982 (1753) Status:Accepted Name Rank:Genus Family: Betulaceae Order: Fagales
	Ostrya Scop. Fl. Carniol. : 414 (1760) Status:Accepted Name Rank:Genus Family: Betulaceae Order: Fagales
	Betula kenaica W.H.Evans Bot. Gaz. 27: 481 (1899) Status:Synonym of Betula papyrifera Marshall Rank:Species Family: Betulaceae
	Betula pubescens subsp. tortuosa (Ledeb.) Nyman Consp. Fl. Eur. : 672 (1881) Status:Synonym of Betula pubescens var. pumila (Zanoni ex Murray) Govaerts Rank:Subspecies Family: Betulaceae
	Betula populifolia Aiton Hort. Kew. 3: 336 (1789) Status:Synonym of Betula pubescens var. pubescens Rank:Species Family: Betulaceae
	Betula lenta Du Roi Harbk. Baumz. 1: 92 (1772) Status:Synonym of Betula pubescens var. pubescens Rank:Species Family: Betulaceae
	Betula uber (Ashe) Fernald Rhodora 47: 325 (1945) Status:Synonym of Betula lenta f. uber (Ashe) McAll. & Ashburner Rank:Species Family: Betulaceae
	Alnus viridis subsp. fruticosa (Rupr.) Nyman Consp. Fl. Eur. : 672 (1881) Status:Synonym of Alnus alnobetula subsp. fruticosa (Rupr.) Raus Rank:Subspecies Family: Betulaceae
	Alnus viridis A.Gray Manual : 424 (1848) Status:Synonym of Alnus alnobetula subsp. fruticosa (Rupr.) Raus Rank:Species Family: Betulaceae
	Alnus viridis subsp. sinuata (Regel) Á.Löve & D.Löve Univ. Colorado Stud., Ser. Bibliogr. 17: 20 (1965) Status:Synonym of Alnus alnobetula subsp. sinuata (Regel) Raus Rank:Subspecies Family: Betulaceae
	Betula nana subsp. exilis (Sukaczev) Hultén Acta Univ. Lund., 2 , 40(1): 579 (1944) Status:Synonym of Betula glandulosa Michx. Rank:Subspecies Family: Betulaceae
	Betula nana subsp. nana Unknown Status:Synonym of Betula nana L. Rank:Subspecies Family: Betulaceae
	Betula neoalaskana Sarg. J. Arnold Arbor. 3: 206 (1922) Status:Synonym of Betula pendula subsp. mandshurica (Regel) Ashburner & McAll. Rank:Species Family: Betulaceae
	Alnus viridis subsp. crispa (Aiton) Turrill Bot. Mag. 173: 382 (1962) Status:Synonym of Alnus alnobetula subsp. crispa (Aiton) Raus Rank:Subspecies Family: Betulaceae
	Carpinus L. Sp. Pl. : 998 (1753) Status:Accepted Name Rank:Genus Family: Betulaceae Order: Fagales
	Betula glandulosa Michx. Fl. Bor.-Amer. 2: 180 (1803) Status:Accepted Name Rank:Species Family: Betulaceae Order: Fagales
	Betula alleghaniensis Britton Bull. Torrey Bot. Club 31: 166 (1904) Status:Accepted Name Rank:Species Family: Betulaceae Order: Fagales
	Betula papyrifera Marshall Arbust. Amer. : 19 (1785) Status:Accepted Name Rank:Species Family: Betulaceae Order: Fagales
	Betula pendula Roth Tent. Fl. Germ. 1: 405 (1788) Status:Accepted Name Rank:Species Family: Betulaceae Order: Fagales