I.Introduction
II. General features of the coast of Lake Michigan.
I. The ecological factors.
LIGHT AND HEAT
WIND
SOIL
WATER
OTHER FACTORS.
IV. The plant societies.·
ATHE BEACH
1. The lower beach
2. The middle beach
3. The upper beach
4. Fossil beaches
B.THE EMBRYONIC OR STATIONARY BEACH DUNES.
1. Dunes ofrapid growth (primary embryonicdunes..
2. Dunes of slow growth (secondaryembryonic dunes)
C.THE ACTIVE OR WANDERING DUNES.THE DUNE COMPLEX
1. Transformation of stationary intowandering dunes
2.Physical and biological features of thedune-complex
3. Encroachment on preexisting plantsocieties
4. Capture of the dune-complex byvegetation
D. THE ESTABLISHED DUNES
1. The basswood-maple series
2. The evergreen series
3. The oak dunes
V. Conclusion
VI. Previous studies of sand dune floras
BIBLIOGRAPHY