ZANNICHELLIACEAE 8 1 



The curved apex of the embryo point- 

 ing inside the base. 

 Keels of the fruit dentate or 



crisped. 25. P. confervoides . 



Keels of the fruit, if any, smooth. 24. P. pusillus. 



i. P. natans L. N. S. to B. C, south to N. J., Pa., Mo., Neb. and 

 Southern Cal. Also in Europe and Asia. 



Conn. Rare or local, increasing in New London Co. 



N. Y. From Peekskill, Westchester Co., northward. Rare and 



local. 

 N. J. Budd's Lake and vicinity; not recorded south of MorrisCo . 

 Pa. Northampton Co., rare. 



2. P. Oakesianus Robbins. Me. to Wise, south to N. J. 



Conn. Stafford and Middlebury. 



N. Y. Common on L. I.; Otis Summit, Greene Co.; perhaps in 



the intervening territory. 

 N. J. Bergen, Middlesex, Burlington and Atlantic counties. 

 Pa. Pocono Plateau, Monroe Co., Broad Mt., Carbon Co. 



3. P. lateralis Morong. Mass. and Conn. 



Conn. Salisbury, not recently collected. 



4. P. Vaseyi Robbins. Quebec to Wise, south to southern N. Y. 



Conn. Lake Saltonstall, Milford and Plymouth. 

 N. Y. Greenwood Lake, Orange Co. 



5. P. diversifolius Raf. N. H. to Cal., south to Fla. and northern 



Mex. Also in Cuba. 



Conn. In the coastal counties. 



N. Y. L. I. and S. I., and at Riverdale, N. Y. City (according to 



Bicknell) ; not recorded northward. 



N. J. Throughout the state, except the pine-barrens, increasing 



southeastward. 

 Pa. Monroe, Northampton and Chester counties. 



6. P. dimorphus Raf. (P. Spirillus Tuckerm.). N. S. to Minn. 



and Cal., south to Va. and Mo. 



Conn. Throughout. 



N. Y. Throughout, increasing southward. 



N. J. Throughout, increasing southward; but unrecorded from 



the pine-barrens. 

 Pa. Delaware Water Gap to Bucks and Delaware counties. 

 7 



