Ⅰ.Introduction.
Ⅱ.General features of the coast of Lake Michigan.
Ⅲ.The ecological factors.
LIGHT AND HEAT.
WIND.
SOIL.
WATER.
OTHER FACTORS.
Ⅳ.The plant societies.
A.THE 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 of rapid grouth (primary embryonic dunes).
2.Dunes of slow growth (secondary embryonic dunes).
C.THE ACTIVE OR WANDERING DUNES. THE DUNE-COMPLEX.
1.Transformation of stationary into wandering dunes.
2.Physical and biological features of the dune-complex.
3.Encroachment on preexisting plant societies.
4.Capture of the dune-complex by vegetation.
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.
