246 GEOLOGICAL SURVEY OF NEW JERSEY. 
Mickleton—B. Heritage. Camden: Little Timber Creek— 
Martindale; Haddonfield—J. L. Pennypacker. Burlington: 
Moorestown—J. Stokes. Monmouth: Not common—Knies- 
kern. Mercer: Trenton—Apgar. Union: Plainfield—Tweedy ; 
and frequent in swamps in the northern counties. 
ZYGADENUS, Michz. 
Zygadenus, 
4%. leimanthoides, Gray. 
In low grounds. Ocean and Mormouth: Rather rare— 
Knieskern; Mt. Pleasant—R. W. Brown; Toms River— 
Parker. Mercer: Princeton Junction—Peters. Burlington: 
Near Atsion—Parker. Camden: Griffith’s Swamp—C. E. 
Smith. 
AMIANTHIUM, Gray. 
Fly Poison. 
A. muscetoxicum (Walt.), Gray. 
In low meadows. Bergen: Abundant in Saddle River 
township near Arcola—Woolson; Rochelle Station—Leggett. 
Mercer :—Torrey. Burlington: In woods near Burlington, 
1844—Cooley in Torrey Herb.; Pemberton—Miss Willmarth ; 
Moorestown—J. Stokes; Beverly—Apgar. Camden: Meadows 
near Camden—Parker. Cumberland: Vineland—Mrs. Treat. 
Gloucester: One mile west of Mickleton—B. Heritage. 
PONTEDERIACE. 
PONTEDERIA, L. 
Pickerel-weed. 
P. cordata, L. 
Frequent in shallow water throughout the State. 
Var. angustifolia, Pursh. 
Morris: Southern end of Green Pond—Rudkin. Burling- 
ton: Quaker Bridge— Martindale; Atsion—C. D. Fretz. 
Gloucester: Franklin—Parker. 
