The list is arranged alphabetically by the names of the genera.
The * denotes that the plant is native to North America.
The ‡ indicates species that are recommended by the Central Experimental Farms, Ottawa, Ontario.
It is often difficult to determine whether a group should be listed among shrubs or trees. Sometimes the plant is not quite a tree and is yet something more than a shrub or bush; sometimes the plant may be distinctly a tree in its southern range and a shrub in its northern range; sometimes the same genus or group contains both shrubs and trees. In the following genera there are doubtful cases: æsculus, alnus, amelanchier, betula, caragana, castanea, cornus (C. florida), cratægus, elæagnus, prunus, robinia.
Dwarf buckeye, Æsculus parviflora (Pavia macrostachya).* Attractive in habit, foliage, and flower; produces a large foliage mass.
Alder. Several bushy species of alder are good lawn or border subjects, particularly in wet places or along streams, as A. viridis,* A. rugosa,* A. incana,* and others.
June-berry, Amelanchier Canadensis* and others. Flowers profusely in spring before the leaves appear; some of them become small trees.
Azalea, Azalea viscosa* and A. nudiflora.* Require partial shade, and a woodsy soil.
Japanese azalea, A. mollis (or A. Sinensis). Showy red and yellow or orange flowers; hardy north.
Groundsel tree, “white myrtle,” Baccharis halimifolia.* Native on the Atlantic seashore, but grows well when planted inland; valuable for its white fluffy “bloom” (pappus) in latest fall; 4-10 ft.