SUMMARY 



"Volume 5. Florida" is the fifth volume of an Atlas showing 

 the natural distribution or range of the native tree species of the 

 continental United States. Florida merits a separate volume be- 

 cause it has more native tree species than any other State (except 

 Hawaii I , and because it has a large number of tropical species 

 found in no other State. 



The native trees of Florida (excluding hawthorn, Crataegus) 

 mapped in this volume total 262 species. Florida maps of 164 

 species are reproduced from portions of maps in Volumes 1 and 

 4. These include 13 of conifers and 151 of temperate hardwoods. 

 Large maps of 98 species of tropical hardwoods of South Florida 

 are added. Ten listed species of hawthorn (Crataegus) increase the 

 State total to about 272. 



The Florida maps have been compiled from various sources, 

 following the procedure reviewed in previous volumes. These in- 

 clude publications, herbarium specimens, field work, and review 

 by local specialists. 



Species maps follow the general plan of earlier volumes. The 

 scale of the Florida base map of the maps repeated from Volumes 

 1 and 4 is the same — 1:10,000,000. The 98 new maps of tropical 

 hardwoods have the scale roughly 1 :4,000,000. Natural geographic 

 distribution of each species is shown as a brown-shaded pattern of 

 fine dots on the black-and-white base map. Outlying stations are 

 plotted by large or small dots. 



Order of maps within the 3 lists is alphabetical by scientific 

 name. Scientific and common names follow the Forest Service 

 Check List ( 1953 I , except for minor revision on nomenclature. 



Also, the range of each species, both within Florida and beyond, 

 is summarized in text. References to any maps in other Atlas 

 volumes are added. 



Notes on ranges are included. Many tree species of Florida have 

 extensive ranges beyond. Six have broad east-west distribution 

 nearly across the continental United States, while 7 range from 

 Canada to South Florida. Nine temperate tree species of Florida 

 reappear in the mountains of Mexico or also in Central America. 

 Many species are widespread in the eastern half of the conti- 

 nental United States and generally reach their southern limits in 

 northwestern or northern Florida. Most tropical tree species native 

 in southern Florida are present also in the West Indies and 

 southward on the continent. Of the 98 species, 67 are found in 

 Puerto Rico. 



Rare and local species are listed. The tropical region of South 

 Florida including the Florida Keys has the greatest collection of 

 rare native trees anywhere in the continental United States, 60 

 species classed as rare or local. Apparently South Florida has no 

 local or endemic tree species, but 4 endemic tree varieties have 

 been distinguished. However, all these species at the northern edge 

 of their natural ranges would be classed as border or peripheral. 



STATISTICAL SUMMARY OF THE ATLAS 



"Atlas of United States Trees" in 5 volumes has compiled maps 

 showing the natural range of the native tree species of the conti- 

 nental United States except hawthorns (Crataegus) in the eastern 

 half. A statistical summary with numbers of species follows. 



"Volume 1, Conifers and Important Hardwoods" has 201 spe- 

 cies, including 94 of conifers and 107 of hardwoods (also 2 shrub 

 species of conifers) . A map of North America is added for 67 spe- 



cies (also 2 shrub species of conifers). Also, 27 species (and 1 

 shrub species) have maps for both the Eastern and Western United 

 States. There are 4 base maps and 9 transparent overlays. Total, 

 313 maps (all black and white). 



"Volume 2, Alaska Trees and Common Shrubs" has 38 tree spe- 

 cies, including 6 shrub species of willow (Salix) rarely reaching 

 tree size (also 44 more of common shrubs, making 82 species maps 

 in color). Also 23 general maps (8 in color). Total, 105 maps. 

 All Alaska tree species except 7 shrub species rarely reaching tree 

 size are also in another volume. 



"Volume 3, Minor Western Hardwoods" has 210 species. A 

 map of North America is added for 62 species (including 2 of 

 Alaska not in the contiguous United States) . Also, 15 species have 

 both northwestern and southwestern maps. There are 4 base maps. 

 Total, 289 maps (all in color except base maps) . 



"Volume 4, Minor Eastern Hardwoods" has 166 species (includ- 

 ing 19 also in Volume 3). A map of North America is added for 

 42 species (including 12 also in Volume 3). Also, 18 species have 

 both northeastern and southeastern maps. There are 4 base maps. 

 Total, 230 maps (all in color except base maps). 



"Volume 5, Florida" has 262 species on 126 pages. There are 

 large maps of this State for 98 species of tropical hardwoods con- 

 fined mostly to the southern part (6 also in other States). This 

 volume repeats the Florida portions (a few slightly revised) of 170 

 species from Volumes 1, 3, and 4, (mostly 6 to a page). Also, 

 there are 6 general maps. Total, 265 maps (all in color except 4 

 general maps). 



Together, the 5 volumes contain 1,205 maps, or 1,069 pages of 

 maps, including 50 base and general maps and 173 showing dis- 

 tribution in North America. The number of native tree species of 

 the continental United States mapped in all volumes is 655, after 

 subtraction for duplications. Charted also are 2 shrub species of 

 conifers and the Alaska ranges of 41 other shrub species. 



"Volume 6, Supplement" will have small maps of hawthorns 

 (Crataegus). Occurrence merely by State will be shown for 35 

 species (10 in Florida) . 



Thus, as defined and mapped here, the number of tree spe- 

 cies native in the continental United States is about 683 (when 

 Crataegus, hawthorn is added). This number includes some shrub 

 species rarely attaining tree size and often omitted from tree lists. 

 Also counted are 98 species of tropical hardwoods confined mostly 

 to southern Florida and native in no other State. Native conifers 

 total 94 tree species (also 2 shrub species), all in Volume 1. 



Mapped with the hardwoods in Volumes 1, 3, 4, and 5 are 22 

 species of monocotyledons reaching tree size. The palm family, 

 Palmae, has 11 native tree species of palms (1 southwestern and 10 

 southeastern) . Yuccas, genus Yucca, of tree size total 11(9 south- 

 western and 2 southeastern) . 



All the maps are the same scale, 1:10,000,000, except for the 

 98 large maps of Florida in this volume. Thus, the maps may be 

 compared readily. The 9 overlays on geography, climate, and 

 forest types in Volume 1 can be adapted to the others. Even the 

 maps of Alaska have the same scale. 



Volumes 2, 4, and 5 have species ranges summarized in text 

 for reference. Revised ranges of the remaining species will be 

 in Volume 6 and the forthcoming Forest Service Check list. 



Maps may be located by the indexes of scientific names and 

 common names and by the list under Contents in each volume. 

 Volume 5 has references to any maps of the same species in other 

 volumes. Also Volume 6 will have an index to all maps. 



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