Betula nigra
Bush - 600 - United States
Bush - 661 - United States
Bush - 908 - United States
Danely - 58 - United States
Davidse - 38059 - United States
Davidse - 43072 - United States
Hall - 611 - United States
Hopkins - 2944 - United States
Hopkins - 593 - United States
Kellogg - s.n. - United States
Little - 36187 - United States
Lundell - 12826 - United States
Nelson - 5411 - United States
Nogle - 8723 - United States
Palmer - 10475 - United States
Palmer - 11999 - United States
Palmer - 31741 - United States
Palmer - 5149 - United States
Palmer - 7870 - United States
Palmer - 9000 - United States
Palmer - 9350 - United States
Reverchon - 2169 - United States
Reverchon - s.n. - United States
Stevens - 1969 - United States
Stone - 4191 - United States
Stratton - 609 - United States
Timme - 15691 - United States
Yatskievych - 89-83 - United States