254 GEOLOGICAL SURVEY OF NEW JERSEY. 
Point—Britton; and very abundant at Howell’s Pond, Pink- 
ney ville—Merrill ; and common in the southern counties. 
SYMPLOCARPUS, Salish. 
Skunk Cabbage. Skunkweed. 
S. footidus (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. 
LEMNA, L. 
; Duck-weed. 
L. trisulca, L. 
In ponds. Bergen: Closter—Austin. Passaic: Passaio— 
Leggett. Morris: Troy—Prof. J. T. Benedict. Essex :— 
Rusby. 
L. Valdiviana, Philippi. (Z. Torreyi, Austin.) 
Bergen: In ponds, Closter—Austin. Union: Near Plain- 
field—T weedy. 
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. 
