ID,Major group,Family,Genus hybrid marker,Genus,Species hybrid marker,Species,Infraspecific rank,Infraspecific epithet,Authorship,Taxonomic status in TPL,Nomenclatural status from original data source,Confidence level,Source,Source id,IPNI id,Publication,Collation,Page,Date,Accepted ID kew-21619,A,Betulaceae,,Betula,,"populifolia",,"","Aiton",Synonym,,H,WCSP,21619,,"Hort. Kew.","3: 336","","1789",kew-21658 kew-21620,A,Betulaceae,,Betula,,"populifolia",,"","Marshall",Accepted,,H,WCSP,21620,107861-1,"Arbust. Amer.","19","","1785", kew-330325,A,Betulaceae,,Betula,,"populifolia",f.,"incisifolia","Fernald",Synonym,,L,WCSP,330325,32229-2,"Rhodora","47: 304","","1945",kew-21620 kew-376125,A,Betulaceae,,Betula,,"populifolia",var.,"pendula","Loudon",Synonym,,L,WCSP,376125,,"Arbor. Frutic. Brit.","3: 1707","","1838",kew-21620 kew-376126,A,Betulaceae,,Betula,,"populifolia",f.,"pendula","(Loudon) H.J.P.Winkl.",Synonym,,L,WCSP,376126,,"Pflanzenr.","IV, 61: 80","","1904",kew-21620