An avenue of trees is always a beautiful sight to behold. In parks and gardens, trees are more protected but on the roads they face the full blast of pollution. The trees suffer toxic fumes; the evils of paving lays stress on their roots; and the lack of care, in terms of soil and water inspection, further catapults the health of the tree.

Some trees are particularly sensitive to these hardships, whereas others are more hardy and willing to face these adversities. The following are descriptions of some truly sturdy trees:

Littleleaf Linden (Tilia Cordata)
Description:
The Linden is a large spreading tree, which grows up to 60 to 70 feet in height. The tree is crowned with thick foliage of dark green leaves, which assumes roughly a pyramidal shape. When in bloom it sports yellow flowers.
Advantages:
The Linden bravely bares the brunt of pollution. It also adapts well to most soils - whether they are acid or alkaline in nature.
Disadvantages:
The Linden tends to shed excessively - flowers and seedpods regularly present themselves at the foot of these trees.
Care:
Best results may be obtained by ensuring that the soil is moist and well drained. In terms of planting, choose a spot that will not be adversely affected by the routine shedding of this tree.
USDA Zones: 3b to 7

European Hornbeam (Carpinus Betulus)
Description:
The European Hornbeam may grow to a height of 40 to 60 feet tall and up to 30 to 40 feet wide. Smaller versions are also available. Across the seasons it features a lush cover of leaves; and during the fall season it displays nut lets.
Advantages:
The Hornbeam's thick foliage serves to softly cordon off areas and lend an air of privacy.
The Hornbeam may be pruned easily.
This tree is especially impervious to gnawing pests and diseases.
USDA Zones: 5 to 7

American Hornbeam or blue beech (Carpinus Caroliniana)
Description:
The American Hornbeam may attain a height of 20 to 30 feet. The wood is gray and smooth. In the fall, the leaves typically range in shade from yellow to red; and the tree is adorned with nut lets.
Advantages:
The American Hornbeam is a truly hardy tree; it is tolerant of a wide range of soils, and varying amounts of sunlight and water.
Disadvantages:
In the fall it sheds nut lets.
USDA Zones: 3b to 9

§ Panicled Goldenraintree (Koelreuteria Paniculata)
Description:
The Panicled tree may grow to a height of 30 to 40 feet. The tree, when in bloom, is truly a spectacular vision. In the first half of the summer, the tree is generously decorated with long, yellow flowers that appear in clusters. The burst of flowers is ultimately replaced by green seedpods that gradually become brown in color.
Advantages:
This tree is resilient in the face of many adverse factors - including pollution, excessive heat and drought, and varying soils.
USDA Zones: 5 to 8

Black Tupelo (Nyssa Sylvatica)
Description:
The Black Tupelo grows 30 to 50 feet high. The tree is noted for its transformation during the fall season - when it is enveloped in a lovely shade of red.
Advantages:
The Black Tupelo grows well in different types of soils.
Disadvantages:
In the face of pollutants in the air, the Black Tupelo is not able to cope very well. Also, it may be susceptible to leaf spot.
Care:
This tree requires well-drained soil.
USDA Zones: 4 to 9

Lacebark Elm (Ulmus Parvifolia)
Description:
The Lacebark Elm is a very large tree - approximately 40 to 50 feet tall, and quite wide as well. The tree sports a large canopy of dainty leaves coupled with a shaded trunk.
Advantages:
It easily deals with varying weather conditions and soils.
USDA Zones: 7 to 10

There are wide arrays of trees that are differentially suited for varying locations. The following are names of some more hardy trees:
§ Ironwood (Ostrya Virginiana)
§ Bur oak (Quercus Macrocarpa)
§ Pin oak (Quercus Palustris)
§ Shingle oak (Quercus Imbricaria)
§ River birch (Betula Nigra)
§ Sweetgum (Liquidambar Styraciflua)
§ Thornless honeylocust (Gleditsia Triacanthos)

If you like artciles about trees & shrubs....These pages might also interest you:

Guide to Conifers & Evergreens, How to Prune Shrubs, Gardening With Viburnum, Gingko Trees, Growing Magnolias, Japanese Barbury, Katsura Trees,Shrubs as Garden Borders,The Weeping Atlas Tree, Tough Trees, Great Birch Trees, Growing Citrus Trees, How to Prune Shrubs,How to Start Seedlings, Lustrous Abelia, Popular Shrubs, Shrub Winter Care Guide, Shrubs With Berries, Summer Hydrangeas