968 MINNESOTA BOTANICAL STUDIES. 



classification of shore formations under this plan is forthwith 

 presented: 



j. Zonal formations. 



A. Beach Or strand. 



1. Front strand. 



2. Mid-strand. 



3. Back strand. 



4. Strand pools. 



B. Dunes. 



1. Dune slopes. 



2. Dune summits. 



3. Dune pools. 



C. Morasses. . 



1. Attached morass. 



a. Wet morass. 



b. Dry morass. 



2. Detached morass. 



a. Floating bog. 



b. Anchored bog. 



D. Surf-barriers. 



1. Barriers in strong surf. 



2. Barriers in light surf. 



E. Rock shores. 



1. Flat rocks. 



2. Rounded rocks. 



F. Soil shores. 



1. Flat shores. 



2. Rounded shores. 

 II. Azonal formations. 



A. Talus shores. 



1. Coarse talus shores. 



2. Fine talus shores. 



B. Boulder shores. 



1. Coarse boulder shores. 



2. Fine boulder shores. 



C. Rock shores. 



1. Irregular surfaced rock shores. 



2. Creviced shores. 



3. Precipitous shores. 



D. Humus shores. 



A discussion of the particular plant formations, which char- 

 acterize these different ecologic areas will now be presented. 



