Platk XXXIX. 



.LAKE MICHIGAN 



CAKILE-XAH 



\Ainmophlla Dune. / 



OALAMOVILPA DUNE 



i 



Prunus pumila 



Dune. I 



i 1 

 Populus caif d 1 cans 



Dune 



ERCUS VELUTINA ASSOC. 



QUERCUS-CARYA ASSOC. 



i 

 ULMUS-ACER ASSOC. 



i 

 ACER SACCHARU!/. ASSOC. 



Lenna-Riccia Assoc. 



MENYANTHES-SAGITTARIA ASSOC. 



1 . 

 OAREX ASSOC. 



Plankton Assoc. / 

 Ohara Assoc. ^ 



i y 



OASTALIA-NYMFHAEA ASSOC! 



PHRAGMITES-TrPHA ASSOC. 



\ 



Ranunc 



Ranunculus aquatllls 

 caplllaceus Assoc. 



SCIRPUS VALIDUS ASSOC. 



i IC 



SCIRPUS AMERICANUS ASSOC. 



CALAMOGROSTIS CANADENSIS 

 ASSOC 



OLADIUM ASSOC. 



•IRIS ASSOCX / Osmunda Assoc. 

 1 / 



S SPICATA PRAIRIE ASSOC. 



Diagram showing the successions exhihited hetween 

 the plant associations in the Beach Area, Illinois, 

 primary successions. 



" secondary successions due to clearing, 



turning or other disturhlng factors. 

 Capital letters denote the important associations. 



