PLANiTS OF SOUTHERN NEW JERSEY. 327 



PONTEDERIA L. 



Pontederia cordata L. Pickerel Weed. 



PL XXVII., i'lg. I. 



Pontederia cordata Linnaeus, Sp. PI. 288. 1753 [Virginia]. — Knieskern 33. — 

 Willis 66.— Britton 246. 



Frequent in water along streams throughout the State, extend- 

 ing well back into the heart of the Pine Barrens. The variety 

 angnstifoUa Pursh seems to be merely an extreme leaf from 

 such as we findi in Sagittaria and other aquatic plants. 



Fl. — Late June to mid-September. 



Middle District.— Tensauken (S), Hartford, Fish House, Medford (S), 

 Salem (S), Centerton (S), Franklinville (P). 



Pine Barrens. — Toms River (S), Speedwell (S), Pleasant Mills, Quaker 

 Bridge (C), Hammonton (Bassett), Eighth St., Manumuskin (S). 



Cape May. — Timber and Beaver Creek (S), Cape May. 



HETERANTHERA Ruiz and Pavon. 



Heterantiiera reniformis Ruiz & Pavon. Mud Plantain. 



Heteranthera reniformis Ruiz and Pavon, Fl. Per. I. 43. 1798 [Cercado, 

 Peru].— Barton Fl. Phila. I. 23. 1818.— Willis 66.— Britton 247. 



Northern and Middle districts on muddy river banks and 

 borders of ponds and ditches, frequent. In our area reported 

 only from the shores of the Delaware. 



Fl. — Early July into September. 



Middle District. — Bordentown, Delair, Kaighns Pt., Bridgeport (NB), 

 Salem Co. (C). 



Heteranthera dubia (Jacq.). Water Star Grass. 



Commelina dubia Jacquin, Obs. Bot. II. 9, pi. 59. 1768 [Virginia]. — Britton 

 247. 



Streams and lakes of the Northern district, rarely in the Dela- 

 ware within our limits. 



Fl. — Late July into September. 



Middle District. — Delaware River, Camden Co. (NB). 



