108 Proceedings of tJie Ohio State Academy of Science. 



Eqiiiseteae 

 Equisitaceae. 



Equisetum arvense L. Edge of marsh at foot of Baltimore and 

 Ohio rail road embankment, east shore of Lake; ruderale 

 society, Honey Creek. 



ANGIOSPERMAE "* 



Monocotylae . -^ 



Typhaceae. 

 Typha lati folia L. Of general distribution in the shallow waters 

 of the lake, at land margins and in the interior of many 

 islands. 

 T. angustifolia L. Of general distribution in the lake, but less 

 frequent than the former on shores and does not occur on 

 the islands. Generally requires deeper water than the former 

 species. 



Sparganiaceae. 



Sparganium eurycarpum Englm. Associated with Typha latifolia 

 whenever the latter occurs abundantly. 



Najadaceae. 



Potamogeton natans L. Of general distribution in water 5^ and 



less feet deep. 

 P. lonchites Tuckm. Most abundant species and most widely 



distributed from water 5^ feet deep to stranded on the 



shore. • 



P. lucens L. Two plants east of and near Beech Island. 

 P. zo'Sterifolius Schumacher. Generally distributed forming 



dense mats in shallow water in sheltered situations. 

 P. pusillus L. Not very abundant but generally distributed. 

 P. foliosus Raf. Marsh east of Custer's Point and near small 



islands north of Cranberry Island. 

 P. pectinatus L. Abundant and widely distributed in water from 



5J^ feet deep to stranded on low shores. 



