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 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
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