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	Betula alba var. cordifolia (Regel) Fernald Amer. J. Sci., ser. 4 14: 177 1902 Status:Unchecked Rank:Variety Family: Betulaceae
	Betula alba var. carpatica Fernald Amer. J. Sci. ser. 4, 14[164]: 179, t. 5, f. 13-14. 1902 Status:Unchecked Rank:Variety Family: Betulaceae
	Alnus tenuifolia var. ferrugineo-tomentosa Brayshaw Occas. Pap. British Columbia Prov. Mus. 18: 133, nom. nov., without replaced synonym page. 1976 Status:Unchecked Rank:Variety Family: Betulaceae
	Alnus silesiaca var. macrocarpa Callier Repert. Spec. Nov. Regni Veg. 10: 232 (1911) Status:Unchecked Rank:Variety Family: Betulaceae
	Alnus fiekii var. dressleri Callier Jahresber. Schles. Ges. Vaterl. Cult. 69(2): 84 (1891 publ. 1892) Status:Unchecked Rank:Variety Family: Betulaceae
	Betula humilis var. genuina Kjellm. Norra Ishav. Algfl. 52. 1883 From Nordenskiold, Vega-exped. vetenskapliga Iakttagelser, 2. Status:Unchecked Rank:Variety Family: Betulaceae
	Betula humilis var. fastigiata Hort Status:Unchecked Rank:Variety Family: Betulaceae
	Betula alba var. cordifolia (Regel) Fernald Status:Unchecked Rank:Variety Family: Betulaceae
	Betula alba var. schugnanica B.Fedtsch. Trudy Bot. Muz. Imp. Akad. Nauk 1: 163 (1902) Status:Synonym of Betula tianschanica Rupr. Rank:Variety Family: Betulaceae
	Betula purpusii var. typica C.K.Schneid. Ill. Handb. Laubholzk. 1: 102 (1904) Status:Synonym of Betula × purpusii C.K.Schneid. Rank:Variety Family: Betulaceae
	Betula pubescens var. borealis (Spach) Á.Löve & D.Löve ? Status:Synonym of Betula pumila L. Rank:Variety Family: Betulaceae
	Betula pumila var. typica Regel Bull. Soc. Imp. Naturalistes Moscou 38(II): 410 (1865) Status:Synonym of Betula pumila L. Rank:Variety Family: Betulaceae
	Betula pumila var. pumila Status:Synonym of Betula pumila L. Rank:Variety Family: Betulaceae
	Betula pubescens var. songarica Regel Bull. Soc. Imp. Naturalistes Moscou 41(I): 995 (1869) Status:Synonym of Betula tianschanica Rupr. Rank:Variety Family: Betulaceae
	Betula alba var. soongorica (Regel) Dippel Handb. Laubholzk. 2: 174 (1891) Status:Synonym of Betula tianschanica Rupr. Rank:Variety Family: Betulaceae
	Betula alba var. microphylla Regel Bull. Soc. Imp. Naturalistes Moscou 51: 223 1868 Status:Synonym of Betula tianschanica Rupr. Rank:Variety Family: Betulaceae
	Betula schmidtii var. lancea Nakai Bot. Mag. (Tokyo) 33: 46 (1919) Status:Synonym of Betula schmidtii Regel Rank:Variety Family: Betulaceae
	Betula schmidtii var. angustifolia Makino & Nemoto Fl. Japan , ed. 2: 185 (1931) Status:Synonym of Betula schmidtii Regel Rank:Variety Family: Betulaceae
	Betula sandbergii var. fernaldii Lepage Naturaliste Canad. 103: 229 (1976) Status:Synonym of Betula × sandbergii Britton Rank:Variety Family: Betulaceae
	Betula microphylla var. utahensis (Britton) M.E.Jones Contr. W. Bot. 13: 22 (1910) Status:Synonym of Betula × utahensis Britton Rank:Variety Family: Betulaceae
	Betula fontinalis var. utahensis (Britton) Garrett Spring Fl. Wasatch , ed. 3: 19 (1917) Status:Synonym of Betula × utahensis Britton Rank:Variety Family: Betulaceae
	Betula fontinalis var. piperi (Britton) Sarg. J. Arnold Arbor. 1: 65 (1919) Status:Synonym of Betula × utahensis Britton Rank:Variety Family: Betulaceae
	Betula occidentalis var. fecunda Fernald Rhodora 47: 317 (1945) Status:Synonym of Betula × utahensis Britton Rank:Variety Family: Betulaceae
	Betula pumila var. fastigiata Rehder Stand. Cycl. Hort. 1: 499 (1914) Status:Synonym of Betula pumila L. Rank:Variety Family: Betulaceae