MOSELEY. 41 



P. friesii, Rupr.* 



Sandusky Bay, Put-in-Bay ; infrequent. 



P. heterophyllus, Schreb.* 



Frequent; especially the variety longipeduncula- 

 tus. The variety maximus occurs at North Bass. 



P. hillii, Morong.* 



East Harbor ; rare. 

 P. interruptus, Kitaibel.* 



Sandusky Bay, Put-in-Bay ; rare. 

 P. lonchites, Tuckerm. 



Common. 

 P. lucens, L.* 



Frequent. 



P. NATANS, L. 



Common, as is also the so called variety, prolixus. 



P. PECTINATUS. L. 



Abundant- 



P. PERFOLIATUS. L. 



Frequent. 

 P. perfoliatus richardsonii A. Bennett. 

 Abundant. 



P. PRAELONGUS, Wulf.* 



Sandusky Bay, August Guenther. Perhaps its 

 habit of withdrawing beneath the water, as 

 soon as its fruit is set, has prevented us from find- 

 ing much of it. 



P. pusillus, L.* 

 Infrequent. 



P. robbinsii, Oakes. 



Sandusky Bay; 'scarce. 



P. zizii, Roth.* 



Sandusky Bay ; scarce. 



P. zoster^efolius, Schum. 

 Common. 



TRIGLOCHIN, L. Arrow Grass. 



T. PALUSTRE, L.* 



Castalia Sporting Club grounds ; rare. 



