Native Trees 221 at www.japanese-home-gardens.com

The Canada Department of Forestry has published native trees 221 Trees of Canada (1961) with descriptions and photographs of nearly all the 150 native trees 221 tree species in 48 genera and 24 families. Several provinces have publications for tree or plant identification. Pocket Guide to Alaska Trees (1950) contains all of Alaska's 30 native trees 221 tree species.

References for Tree Identification.—The United States has approximately 785 species of native trees 221 trees in 221 genera and 69 plant families, according to the U.S. Forest Service Check List (1953), which contains names and ranges. However, 148 of these are hawthorns (genus Crataegus) and about 125 are tropical and subtropical trees of Florida and southern Texas. The number of kinds of common trees native trees 221 in one locality is but a fraction of the total. Fewer than 175 species in about 50 genera and 25 families are commercially important for lumber.

Some parts of the world are more richly endowed with tree species than others with comparable climates. For example, Australia and New Zealand have no native trees 221 pines, but Monterey pine, a rare native trees 221 tree of the California coast, thrives in forest plantations in those countries. The large genus Eucalyptus, nearly confined to Australia as a native trees 221 plant, is now widely grown in tropical and subtropical lands around the globe. Where needed, exotics should be selected with care. Seeds should be obtained from a locality with corresponding climate. For example, seeds from near the colder limit of a species should produce hardier trees though possibly of slower growth.