4 MISC. PUBLICATION 217, U. S. DEPT. OF AGRICULTURE 



Information concerning the native trees of the eastern and 

 western divisions of the United States will be found respectively on 

 pages 5 and 24. A view in the western forest division is shown in 

 plate 1, and in plate 2 are shown some important eastern forest trees. 



DESCRIPTIVE LIST OF NATIVE FOREST TREES 



A summary of the names of all the native tree species of continental 

 United States with brief notes on their ranges and characteristics 

 follows. 6 It constitutes one of the major features of this publication. 

 The trees are listed under two groups in order to segregate those 

 growing in the eastern and western portions of the United States. 

 A few species range across the continent. A few species appear 

 without a common name, chiefly because they have not been commonly 

 recognized in the sections where they grow. In the Forest Service 

 both the common and scientific names of trees are passed upon by a 

 special committee named by the chief forester, to whom its recom- 

 mendations are referred for approval. 7 



The fist does not generally include the names of varietal forms or of 

 hybrids, of which there are a few hundred recognized forms (see foot- 

 note 3), more largely among the oaks and buckeyes than any other 

 groups. For example, the species white oak {Quercus alba) is given, 

 but not the varietal form Q. alba latiloba or the hybrid Q. jernowii. 

 No introduced, or exotic, trees are included although there are many, 

 and some have found a congenial home here and become naturalized, 

 such as the silverleaf poplar, chinaberry, paper and white mulberries, 

 ailanthus, paulownia, Norway spruce, and Scotch pine. The more 

 important or abundant species or kinds of trees growing in each broad 

 forest region will be found listed under the descriptions of the several 

 forest regions, pages 39 to 46. 



FOREST TREES OF THE UNITED STATES 



The names of all the native tree species in the United States 8 are 

 here given. Also the distribution of each is given in broad terms, and 

 the descriptive notes include some of the leading characteristics. 

 The trees are grouped under two divisions, namely Eastern Forest 

 Trees and Western Forest Trees. 



Unless otherwise stated the leaf arrangement on the stem is alter- 

 nate. The order of listing the different trees is according to a natural 

 sequence widely recognized and used by botanists. In general, it 

 begins with the simplest or earliest group of trees and ends with the 

 most highly developed group. For additional information concern- 

 ing the range and characteristics, reference should be made to tree 



6 Except the hawthorns or haws (Crataegus) of the eastern part of the United States. 



7 In the preparations of this publication, particularly the following portion on forest trees, the author 

 claims little originality in subject matter. On the other hand, the publication represents an attempt to 

 present in a useful form information for handy reference that has been largely obtained by others. The 

 basis for the names and ranges of the trees is the following, with subsequent approved amendments: Sud- 



WORTH, G. B. CHECK LIST OF THE FOREST TREES OF THE UNITED STATES: THEIR NAMES AXD RANGES. U. S. 



Dept. Agr. Misc. Circ. 92, 295 pp. 1927. For much of the information about the less common trees sum- 

 marized under the heads of Where the Tree Grows and Descriptive Notes, credit is due to various sources, 

 including the following: 



Sargent, C. S. manual of the trees of north America (exclusive of mexico). Ed. 2, 9l0pp.,illus. 

 Boston and New York. 1922. 



COKER, W. C, and TOTTEN, H. R. TREES OF THE SOUTHEASTERN STATES, INCLUDING VIRGINIA, NORTH 

 CAROLINA, SOUTH CAROLINA, GEORGIA, AND NORTHERN FLORIDA. 390 pp., illus. Chapel Hill, N. C. 1934. 



Jefson, W. L. the silva of California. 480 pp., illus. Berkeley, Calif. 1910. (Calif. Univ. Mem. 

 v.2.) 



8 Except the hawthorns or haws (Crataegus) of the eastern half of the United States. 



