78 ZANNICHELLIACEAE 



N. Y. Greene Co. and at Valley Stream, L. I. (according to 



Bicknell). 

 N. J. Sussex Co. 

 Pa. Pocono Mt. Monroe Co. 



6. S. angustifolium Michx. Ponds and slow streams: Newf. to 



Conn., Pa., Col., Cal. and British Columbia. 



Conn. Canaan and West Goshen, not recently collected. 



N. Y. Catskill Mts. near " Pine Orchard " (old undated specimen, 



not recently collected). 

 N. J. Green Pond, Morris Co. 



7. S. fluctuans (Morong) B. L. Robinson. Cold lakes and ponds: 



Me. to Pa. and Minn. 



Conn. Norfolk, not recently collected. 



Pa. Wayne, Monroe and Schuykill counties. 



8. S. minimum Fries. Lab. to N. J., Tenn., Utah, Oregon and 



Alaska; also in Europe and Asia. Rare in our range. 

 Conn. Twin Lake, Salisbury. 

 N. J. Green Pond, Morris Co. 



ZANNICHELLIACEAE 



Plants monoecious; stamen 1. I. Zannichellia. 



Plants perfect; stamens more than I. 



Stamens 2; connective of the ant her not dilated; fruit stipitate. 2. Ruppia. 



Stamens 4; connective of the anther dilated and perianth-like; 



fruit sessile. 3. Potamogeton. 



i. Zannichellia L.* 



I. Z. palustris L. In fresh or brackish water: Nearly throughout 

 North America, except the extreme north. 

 Conn. Common along the coast, decreasing inland, perhaps 



wanting in the north. 

 N. Y. Local along the coast, decreasing up the Hudson, not 



recorded north of Hyde Park, Dutchess Co. 

 N. J. Local along the coast and up the rivers within the 



influence of the tides. 

 Pa. Luzerne, Northampton, Philadelphia and Chester counties. 



Apparently the only extra-tidal stations are in Luzerne and 

 Northampton counties, Pa. 



* See foot-note, page 76. 



