CATALOGUE OF PLANTS. 257 



POTAMOQBTON, L. 



Pond-weed. 

 P. natans, L. 



Ponds. Apparently quite common throughout the State. 

 P. Oakesianus, Bobbins. 



Bergen : In shallow water at Tenafly Austin. Atlantic : 

 Estelville C. A. Gross. Burlington: Brown's Mills E. J. 

 Pond. 

 P. Pennsylvanicus, Cham. (P. Claytonii, Tuck.) 



In ponds and slow streams. Frequent throughout the State. 

 P. Spirillus, Tuck. 



Camden : In tidal mud, Delaware River Parker. Warren : 

 In the Delaware at Belvidere Britton. Bergen : Closter 

 Austin. Passaic : Paterson Leggett. Morris : Lake Hopat- 

 cong, and Sussex : Cranberry Reservoir and Stump Pond near 

 Branch ville Britton . 



P. hybridus, Michx. 



Ponds and streams. Frequent throughout the State. Often 

 without any floating leaves. 



P. fluitans, Eoth. (P. lonchites, Tuck.) 



Warren : In the Delaware River near Phillipsburg Porter ; 

 Belvidere Britton. Sussex: Swartswood Lake Britton. 

 * Salem : In ditches Commons. 



P. pulcher, Tuck. 



Atlantic : In a pond at Atlantic City, and Salem : Elmer 

 Parker. Ocean : Toms River Porter. 



P. amplifolius, Tuck. 



In deep water. Sussex : Andover and Swartswood Lake 

 Porter; "Waterloo Garber; very luxuriant in Morris Pond 

 near Sparta Britton. Bergen : Hackensack River Austin ; 

 Ramapo River near Mahwah Britton. Passaic : In the Passaic 

 River Rusby. Camden : In the Delaware Parker. Hunter- 

 don : Frequent Best. 



P. gramineus, L. 



Bergen: Waters of the Hackensack Austin. Passaic: 

 Greenwood Lake Rudkin. Sussex : Swartswood Lake and 

 Morris Pond Britton. Morris : Lake Hopatcong Austin. 



