Poplar 45, 159
balsam 291
blue 159
Carolina 47, 49
hickory 159
Lombardy 292
silver-leaf 45, 46
swamp 47
white 159
yellow 159, 160, 298
=Populus= =45=
=alba= =45=, 46
=balsamifera= =291=
_balsamifera_ variety _virginiana_ _47_
=candicans= =292=
=deltoides= =47=, 49, 297, 300
=grandidentata= =50=, 51, 291, 297, 300
=heterophylla= =47=, 48, 297, 300
=nigra= variety =italica= =292=
=tremuloides= =52=, 53, 297, 300