254 GEOLOGICAL SURVEY OF NEW JERSEY. 



Point Britton ; and very abundant at HowelPs Pond, Pink- 

 neyville Merrill ; and common in the southern counties. 



SYMPLOCARPUS, Salisb. 

 Skunk Cabbage. Skunkweed. 



S. fcetidus (L.), Salisb. 



Swamps and low grounds. Common or frequent throughout 

 the State, except in the pine barrens, where it appears to be only 

 occasional. 



ACORUS, L. 



Calamus. Sweet-flag. 



A. Calamus, L. 



Swamps and low grounds. Frequent throughout the State. 



LEMNACE^E. 



LEMNA, L. 



Duck-weed. 

 L. trisulca, L. 



In ponds. Bergen: Closter Austin. Passaic: Passaic 

 Leggett. Morris: Troy Prof. J. T. Benedict. Essex: 

 Rusby. 

 L. Valdiviana, Philippi. (L. Torreyi, Austin.) 



Bergen : In ponds, Closter Austin. Union : Near Plain- 

 field Tweedy. 



L. minor, L. 



On stagnant water. Common throughout the State. 



Var. obscura, Austin. 



Hudson : Abundant near Weehawken, where it usually 

 flowers Austin ; New Durham Leggett. 

 Var. orbiculata, Austin. 



Hudson : New Durham, in ditches and marshes Austin. 



L. perpusilla, Torr. 



In ponds. Bergen : Woodside Austin. Atlantic : Atlantic 

 City E. Diffenbaugh. 

 Var. trinervis, Austin. 



Hudson: Pamrapo Austin. 



