Large-toothed aspen, P. grandidentata.* Unique in summer color; heavier in aspect than the above; old trees become ragged.
Weeping poplar, P. grandidentata, var. pendula. An odd, small tree, suitable for small places, but, like all weeping trees, likely to be planted too freely.
Cottonwood, P. deltoides (P. monilifera).* The staminate specimens, only, should be planted if possible, as the cotton of the seed-pods is disagreeable when carried by winds; var. aurea‡ is one of the good golden-leaved trees.
Balm of Gilead, P. balsamifera* and var. candicans.* Desirable for remote groups or belts. Foliage not pleasant in color.
Lombardy poplar, P. nigra, var. Italica.
Desirable for certain purposes, but used too indiscriminately, it is likely to be short-lived in northern climates.
White poplar, abele, P. alba.
Sprouts badly; several forms.
Bolle’s poplar, P. alba, var. Bolleana.
Habit much like the Lombardy; leaves curiously lobed, very white beneath, making a pleasant contrast.