42 SANDUSKY FLORA. 



ZANNICHELLIA, Mitchell, Horned Pond-Weed. 

 Z. PALUSTRIS. 



The "variety" pedunculata grows, or did grow 

 in one of the rivulets flowing from the Blue Hole, 

 Castalia; rare. 



ALISMACE^E. 



ALISIIA, L. Water-Plantain. 

 A. PLANTAGO, L. 



Common. 



LOPHOTOCARPUS, T. Durand. 



L. calycinus, (Engelm) J. G. Smith.* 



In a small pond bordering the southern 

 boundary of Sandusky. 



SAGITTARIA, L. Arrow-Head. 

 S. ARIFOLIA, Nlltt. 



Oxford, Danbury ; scarce. 



S. GRAMINEA, Michx.* 



Sandusky Bay. "East Harbor," A. J. Pieters. 

 S. latifolia, Willd. ( S. variabilis, Engelm. ) 



Common and variable. 

 S. rigida, Pursh. ( S. heterophylla, Pursh. ) 



Sandusky Bay, Put-in-Bay, Harbors ; frequent. 



In deeper water than the last. 



HYDROCHARIDACE^E. 



ELODEA, Hichx. Water Weed. 

 E. CANADENSIS, Michx. 



Common. Kelley's Island, Put-in-Bay. Filling 

 the cove east of Sandusky so as to make it 

 difficult to row a boat there. 



