(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 J).

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), aesculus, betula (B. pumila), car-pinus, Castanea (C. pumila), catalpa (C. ovata), cercis, magnolia (M. glauca particularly), Ostrya, primus, pyrus, salix, sorbus.

Norway Maple, Acer Platanoides.(Shade Trees) (Recommended)

One of the finest medium-sized trees for single lawn specimens; there are several horticultural varieties. Var. Sckwedleri(Recommended) 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 *(Shade Trees)

Darker and softer in aspect than the ordinary sugar maple.

Sugar Maple, A. Saccharum.* (Shade Trees) (Recommended)

This and the last are among the very best roadside trees.

Silver Maple, A. Saccharinum (A. Dasycarpum).* (Shade Trees)

Desirable for water-courses and for grouping; succeeds on both wet and dry lands.

Wier's Cut-Leaved Silver Maple, A. Saccharinum Var. Wieri. (Shade Trees) (Recommended)

Light and graceful; especially desirable for pleasure grounds.

Red, Soft, Or Swamp Maple, A. Rubrum*

Valuable for its spring and autumn colors, and for variety in grouping.

Sycamore Maple, A. Pseudo-Platanus

A slow grower, to be used mostly as single specimens. Several horticul* tural varieties.

English Maple, A. Campestre

A good medium-sized tree of slow growth, not hardy on our northern borders; see under Shrubs (p. 291).

Japan Maple, A. Palmatum (A. Polymorphum)

In many forms, useful for small lawn specimens; does not grow above 10-20 ft.

Siberian Maple, A. Ginnala.(Shade Trees)

Attractive as a lawn specimen when grown as a bush; the autumn color is very bright; small tree or big shrub.

Mountain Maple, A. Spicatum*

Very bright in autumn.

Box-Elder, Acer Negundo (Negundo Aceroides Or Fraxinifolium).*(Shade Trees)

Very hardy and rapid growing; much used in the West as a windbreak, but not strong in ornamental features.

Horse Chestnut, ÆSculus Hippocastanum.(Shade Trees)(Recommended)

Useful for single specimens and roadsides; many forma.

Buckeye, Ae. Octandra (Ae. Flava).*(Recommended)

Ohio buckeye, Æ. glabra.*

Red buckeye, Æ. cornea (Æ. rubicunda).

Ailanthus, Ailanthus Glandulosa

A rapid grower, with large pinnate leaves; the staminate plant possesses a disagreeable odor when it flowers; suckers badly; most useful as a shrub; see the same under Shrubs (also Fig. 50).

Alder, Alnus Glutinosa

The var. imperialis(Recommended) is one of the best cut-leaved small trees.

European Birch, Betula Alba

Cut-leaved weeping birch, B. alba var. laciniata pendula.(Recommended)

American White Birch, B. Populifolia*

Paper, or canoe birch, B. papyri/era.*

Cherry Birch, B. Lenta*

Well-grown specimens resemble the sweet cherry; both this and the yellow birch (B. lutea*) make attractive light-leaved trees; they are not appreciated.

Hornbeam Or Blue Beech, Carpinus Americana*

Chestnut, Castanea saliva(Shade Trees) and C. Americana.*(Shade Trees)

Showy Catalpa, Catalpa Speciosa.(Shade Trees)(Recommended)

Very dark, soft-foliaged tree of small to medium size; showy in flower; for northern regions should be raised from northern-grown seed.

Smaller Catalpa, C. Bignonioides.(Shade Trees)

Less showy than the last, blooming a week or two later ; lees hardy.

Japanese Catalpa, C Ovata (C. Koempferi).(Recommended)

In northern sections often remains practically a bush.

Nettle-Tree, Celtis Occidentalis.* Katsura-Tree, Cercidiphyttum Japonicum

A small or medium-sized tree of very attractive foliage and habit.

Red-Bud, Or Judas-Tree, Cercis Canadensis*

Produces a profusion of rose-purple pea-like flowers before the leaves appear; foliage also attractive.

Yellow-Wood, Or Virgilia, Cladrastis Tinctoria*

One of the finest hardy flowering trees.

Beech, Fagus Ferruginea.*(Shade Trees)

Specimens which are symmetrically developed are among our best lawn trees; picturesque in winter.

European Beech, F. Sylvatica.(Shade Trees)

Many cultural forms, the purple-leaved being everywhere known. There are excellent tricolored varieties and weeping forms.

Black Ash, Fraxinus Nigra (F. Sambucifolia).*(Shade Trees)

One of the best of the light-leaved trees; does well on dry soils, although native to swamps; not appreciated.

White Ash, F. Americana.*(Shade Trees) European Ash, F. Excelsior.(Shade Trees)

There is a good weeping form of this.

Maiden-Hair Tree, Ginkgo Biloba (Salisburia Adiantifolia).(Recommended)

Very odd and striking; to be used for single specimens or avenues.

Honey Locust, Gleditschia Triacanthos.*(Shade Trees)

Tree of striking habit, with big branching thorns and very large pods; there is also a thornless form.

Kentucky Coffee-Tree, Gymnocladus Canadensis*

Light and graceful; unique in winter.

Bittemut, Hicoria Minima (Or Carya Amara)*

Much like black ash in aspect; not appreciated.

Hickory, H. Ovata, (Or Carya Alba)*(Recommended) And Others. Pecan, H. Pecan.*(Shade Trees)

Hardy in places as far north as New Jersey, and reported still farther.

Butternut, Juglans Cinerea*

Walnut, J. nigra.*

Varnish-Tree, Kaelreuteria Paniculata

A medium-sized tree of good character, producing a profusion of golden-yellow flowers in July; should be better known.

European Larch, Larix Decidua (L. Europcea).(Recommended) American Larch Or Tamarack, L. Americana.* Gum-Tree, Sweet Gum, Liquidambar Styraciflua.*(Shade Trees)

A good tree, reaching as far north as Connecticut, and hardy in parts of western New York although not growing large; foliage maple-like; a characteristic tree of the South.