Among drooping or weeping trees the best may be found in the willows (Salix Babylonica and others), maples (Wier’s), birch, mulberry, beech, ash, elm, cherry, poplar, mountain ash.
Purple-leaved varieties occur in the beech, maple, elm, oak, birch, and others.
Yellow-leaved and tricolors occur in the maple, oak, poplar, elm, beech, and other species.
Cut-leaved forms are found in birch, beech, maple, alder, oak, basswood, and others.
List of hardy deciduous trees for the North.
(The genera are arranged alphabetically. Natives are marked by *; good species for shade trees by †; those recommended by the Experiment Station at Ottawa, Ontario, by DD)
In a number of the genera, the plants may be shrubby rather than arboreus in some regions (see the Shrub list), as in acer (A. Ginnala, A. spicatum), æsculus, betula (B. pumila), carpinus, castanea (C. pumila), catalpa (C. ovata), cercis, magnolia (M. glauca particularly), ostrya, prunus, pyrus, salix, sorbus.
Norway maple, Acer platanoides.(D, DD) One of the finest medium-sized trees for single lawn specimens; there are several horticultural varieties. Var. Schwedleri‡ is one of the best of purple-leaved trees. The Norway maple droops too much and is too low-headed for roadside planting.
Black sugar maple, A. nigrum.(A, DD) Darker and softer in aspect than the ordinary sugar maple.
Sugar maple, A. saccharum.(A, DD) This and the last are among the very best roadside trees.