Contents -- Part 1: Background -- Introduction -- 1. Flora -- 2. Environment -- 3. Plant communities and their distribution -- 4. Vegetation study methods -- Part 2: Southern Forests -- 5. Southern forests - general -- 6. Southern forests - mesic -- 7. Southern forests - xeric -- 8. Southern forests - lowland -- Part 3: Northern Forests -- 9. Northern forests - general -- 10. Northern forests - mesic -- 11. Northern forests - xeric -- 12. Northern forests - lowland -- 13. Boreal forest -- Part 4: Grasslands -- 14. Prairie -- 15. Sand barrens and bracken-grassland -- Part 5: Savanna and Shrub Communities -- 16. Savanna -- 17. Tall shrub communities -- Part 6: Lesser Communities -- 18. Fen, meadow, and bog -- 19. Aquatic communities -- 20. Beach, dune, and cliff communities -- 21. Weed communities -- Part 7: The Vegetation as a Whole -- 22. Postglacial history -- 23. The effect of man on the vegetation -- 24. Interrelations of communities -- Appendix -- Tables for Chapter 4 -- Tables for Chapter 5 -- Figures and tables for Chapter 6 -- Figures and tables for Chapter 7 -- Figures and tables for Chapter 8 -- Figures and tables for Chapter 10 -- Figures and tables for Chapter 11 -- Figures and tables for Chapter 12 -- Figures and tables for Chapter 13 -- Figures and tables for Chapter 14 -- Figures and tables for Chapter 15 -- Figures and tables for Chapter 16 -- Figures and tables for Chapter 17 -- Figures and tables for Chapter 18 -- Figures and tables for Chapter 19 -- Figures and tables for Chapter 20 -- Figure and tables for Chapter 21 -- Figure for Chapter 22 -- Glossary -- Bibliography -- Species list -- Index.