22 



23 

 24 



25 

 26 



27 

 28 

 29 



30 

 31 

 32 

 33 

 34 



35 

 36 



37 

 38 



39 

 40 



41 

 42 



43 

 44 



45 

 46 



47 

 48 



49 



50 



345 



Scirpus volidus association. 



Typha latifolia. 



Castalia-Nyinphaea association. 



Potamogeton natans association. 



Little Dead River. 



NyDiphaea advena. 



Typha latifolia. 



Scirpus validiis association. 



Scirpus aniericanus association. 



Liatris spicata prairie. 



Scirpus aiiiericauus association. 



Paniciim virgatitni ridge. 



Jiincus torreyi association. 



Liatris spicata prairie. 



Jnticus torreyi association. 



Scirpus validiis association. 



Typha latifolia. 



Scirpus aiuericanus association. 



Elgin, Joliet and Eastern railway. 



Swale, whose structure was exceedingly complex. 



A ridge which had been cleared and was covered with w^eeds, 



including especially Polygonnm orientale and Hclianthus 



annuus. 

 Liatris spicata prairie. 



Phragiuites-Typha swamp, eighty feet w^ide. 

 Scirpus validus association. 

 Scirpus americanus association. 

 Chicago and North Western railway. 

 Cultivated land. 



Uhnus-Acer association at the foot of the bluff. 

 Bluff covered for the most part with oak-hickory woods. 



se:ction made along the line oe the pest-house road 

 between waukegan and be'vch, august, i909 



1. Lake Michigan. 



2. Lower beach, devoid of plants. 



3. Middle beach, bare except for an occasional Xanthiuni. 



4. Sali.v syrticola fringing dune. 



5. Depression. 



6. Small Popuhis-Salix dunes. 



7. Andropogon scoparius bunch-grass prairie. 



8. Calamovilfa dune. 



