LITTLE, ELBERT L., JR. 
1981. Atlas of United States trees. Volume 6. 
Supplement. 
U.S. Dep. Agric. Misc. Publ. 1410, 31 p., 39 maps. 
‘Atlas of United States Trees’’ (1971-81) in 6 volumes has maps 
showing the natural range of the native tree species of the continental 
United States. Together, there are 1,244 maps, or 1,081 pages of 
maps, including 53 general and base maps. Volume 6 adds maps for 
35 Crataegus (hawthorn) species and | additional species, Juniperus 
erythrocarpa. 
The number of tree species native in continental United States as 
defined and mapped here, is about 684. Totals include: conifers, 95 
(and also 2 shrub species); monocotyledons, 22; and hardwoods 
(dicotyledons), about 567. Also charted are the Alaskan ranges of 41 
other species of common shrubs. Additional occurrence beyond the 
limits of the United States maps is plotted on 173 maps of North 
America. Volume 6 has indexes of common names and scientific 
names of all species maps in Volumes 1-6. 
OXFORD: 181.1 (73). KEY WORDS: trees (United States); 
United States (trees); maps, plant distribution; atlas. 
Library of Congress Catalog Card Number: 79-653298 
For sale by the Superintendent of Documents, U.S. Government Printing 
Office, Washington, D.C. 20402 
