232 GEOLOGY OF OHIO. 



CXXII. Order JUNCAGINACE^E. Arrow Grass Family. 



597. TRIGLOCHIN L. Arrow-Grass. 



Trigeochin MARITIMA L. 



Franklin Co., W. S. Sullivant (Cat. 1840); Cedar Swamp ( Champaign Co.) Wm. 

 C. Werner. 



TRIGEOCHIN PAEUSTRIS L. 



Franklin Co., W. S. Sullivant (Cat. 1840.) 



598. SCHEUCHZERIA L. 



SCHEUCHZERIA PAEUSTRIS L. 



Lorain Co., A. A. Wright (Cat); Licking Reservoir, Wm. C. Werner. 



CXXIII. Order POTAMOGETONACE.E- Pond-weed Family. ' 



599. POTAMOGETON Iv. Pond-Weed. 



Potamogeton ampeifoeius Tuck. 



Congress Lake (Stark Co.) W. L. Crubaugh. 



Potamogeton EOEiosus Raf. (P. pauciflorus Ph.) 

 Congress Lake (Stark Co.) W. L. Crubaugh. 



POTAMOGETON HETEROPHYELUS Schreb. 



"General, Northern Ohio," H. C. Beardslee (Cat.) 



POTAMOGETON HETEROPHYEEUS MAXIMUS Morong. 

 Painesville, Wm. C. Werner. 



Potamogeton diversifoeius Raf. (P. hybridus Mx.) 

 Painesville, H. C. Beardslee ( Cat.) 



POTAMOGETON EONCHITES Tuckm. 



"General, Northern Ohio," H. C. Beardslee (Cat); Painesville, Wm. C. Werner 



POTAMOGETON EUCENS L. 



"Northern Ohio, rare," H. C. Beardslee (Cat.) 



POTAMOGETON NATANS L. 



Common. 



Potamogeton NUTTAELii Cham. & Schl. ( P. pen?isylvanicus Willd.) 

 "General," H. C. Beardslee (Cat.) 



Potamogeton obTusifoeius Mert. & Koch. 

 Lorain Co., A. A. Wright (Cat.) 



Potamogeton pectin atus L. 

 Not uncommon. 



