Grows luxuriantly; is dignified and beautiful; requires a good soil,
    and in youth needs some protection from extreme cold.

17.  White pine (Pinus strobus)

    Branches gracefully and forms a large, dignified tree; will thrive
    on a variety of soils.

18.  European larch (Larix europaea)

    Has a beautiful appearance; thrives best in moist situations.

19.  Blue spruce (Picea pungens)

    Extremely hardy; forms a perfect specimen plant for the lawn.

20.  Japanese umbrella pine (Sciadopitys verlicillata)

    Very hardy; retains a compact crown.  An excellent specimen plant
    when grouped with other evergreens on the lawn.  Does not grow to
    large size.

21.  Mugho pine (Pinus mughus)

    A low-growing evergreen; hardy; important in group planting.

22.  Obtuse leaf Japanese cypress (Retinospora obtusa)

    Beautiful evergreen of small size; hardy; desirable for group
    planting.

23.  English yew (Taxus baccata)

An excellent evergreen usually of low form; suitable for the lawn, massed with others or as a specimen plant; will grow in the shade of other trees.  There are various forms of this species of distinctive value.

TREES BEST FOR THE STREET

1.  Oriental sycamore (Platanus orientalis)

    Very hardy; will adapt itself to city conditions; grows fairly fast
    and is highly resistant to insects and disease.

2.  Norway maple (Acer platanoides)

    Very hardy; possesses a straight trunk and symmetrical crown; is
    comparatively free from insects and disease and will withstand the
    average city conditions.

3.  Red oak (Quercus rubra)

    Fastest growing of the oaks; very durable and highly resistant to
    insects and disease; will grow in the average soil of the city
    street.

[Illustration:  FIG. 93.—­Street Trees.  Norway Maples.]

4.  Gingko (Gingko biloba)

    Hardy and absolutely free from insects and disease; suited for
    narrow streets, and will permit of close planting.

5.  European linden (Tilia microphylla)

    Beautiful shade-bearing crown; is very responsive to good soil and
    plenty of moisture.

6.  American elm (Ulmus americana)

When planted in rows along an avenue, it forms a tall majestic archway of great beauty.  It is best suited for wide streets and should be planted further apart than the other trees listed above.  Requires a fairly good soil and plenty of moisture, and is therefore not suited for planting in the heart of a large city.

7.  Pin oak (Quercus palustris)