104 
FOURTEENTH REPORT. 
4 
Plu.aKt.on Association 
I 
4 - 
Chara Assoc 
i 
POTAXOIETOM ASSOC 
i 
: Cao t a 1 1 a-Ny mph.aaa Assoc 
X 
CIRP03 validus assoc 
I Rp u S AMERICAN US ASSOC 
June 
llttoralls Ass: 
Potentilla anserlna 
Assoc. 
Elytnus Dune. 
J 
/ 
Heath Assoc. 
/ 
i 
Pinus bar.Ksiana Assoc. 
FINUS STROBUS ASSOC . 
TPine land) 
(Beech-Maple woods) 
Diagram showing the successions exhibited between the plant associations 
in the Douglas Lake Region, Emmet & Cheboygan Counties, Michigan. 1911. 
primary successions. > “ secondary successions 
due to clearing, burning or other disturbing factors. 
Capital letters denote the important associations. The climatic associ- 
ations occupying the most prominent soil types are underlined. (FCG) 
