CONTENTS 



Pate 



List of maps iii 



General maps iii 



Species maps iii 



Introduction ... 1 



History of tree distribution maps 1 



Preparation of the maps 2 



Explanation of the maps 3 



General maps . 4 



Species maps and ranges 8 



Notes on ranges 15 



Applications of the maps 16 



Acknowledgments 16 



Selected references 17 



Maps (Follow text) 



General maps 1—23 

 Species maps 1-82 



Index of common names (Follows maps) 



Index of scientific names (Follows maps) 



LIST OF MAPS 



General Maps 



Map No. 



1. North America 



2. Alaska with place names 



3. National Forests, Parks, and Wildlife Refuges 



4. Topography (contour map) 



5. Relief map 



6. Physiography (physiographic provinces of Alaska) 



7. Geology (generalized) 



8. Extent of glaciation in Alaska 



9. Permafrost 



10. Soils with agricultural potential 



11. Climatic zones 



12. Hydrology 



13. Precipitation 



14. Mean annual snowfall 



15. Mean annual temperature (°F.) 



16. Mean July maximum temperature (°F.) 



17. Mean January minimum temperature (°F.) 



18. Thawing index 



19. Freezing index 



20. Plant hardiness zones 



21. Fire season climatic zones 



22. Vegetation of Alaska 



23. Forests of Alaska 



Species Maps ' 



Map No. 



Yew family (Taxaceae) 



1. Pacific yew, Taxus brevijolia Nutt I S SI 



Pine family (Pinace.. 



2. lodgepole pine, Pinus contorta Dougl. I ST-LT. C) 



3. tamarack. Larix laricina I Du Roi I K. Koch i STMT. I 



4. black spruce, Picea mariana (Mill.) B.S.P. (ST-MT, 1 



5. * white spruce, Picea glauca (Moench) Voss Mill. 



6. *Sitka spruce, Picea sitchensis (Bong.) Carr. LI 



7. "western hemlock, Tsuga heterophyUa (Raf.) Sari:. IT. I 



8. 'mountain hemlock. Tsuga mertensiana (Bong.) Carr 



LT.C) 



9. Pacific silver fir, Abies amabiUs (Dougl.) Forbes (MT-LT, C 

 10. subalpine fir, Abies lasiocarpa (Hook.) Nutt. (ST-LT, C 



1 Size is indicated 1>\ letters: 1 1". la MT. medium tree 



small tree; I S. large shrub; MS, medium shrub SS. • .ill shrub 

 prostrate shrub. General distribution is given as I. interior, arui 

 with -mail letter where restricted, The 10 tree sp< -!y all 



the commercial timbei are indicated by an as :ion under 



Species Maps and Ranges, page S. 



in 



