CATALOGUE OF PLANTS. 255 



SPEIRODBLA, Schleid. 

 Duck-weed. 



S. polyrhiza (L.), Schleid. (Lemna polyrhiza, L.) 

 Ponds. Common throughout the State. 



WOLFPIA, Horkel. 



Wolffia. 

 W. Columbiana, Karsten. 



Bergen : Closter, rare Austin. Camden : Kaighn's Point- 

 Martindale. 



ALISMACE^E. 



ALISMA, L. 

 'Water Plantain. 



A. Plantago, L. (Including var. Americanum, Gray.) 



In shallow water. Common throughout the State. 



SAGITTARIA, L. 

 Arrow Head. 



S. sagittsefolia, L., forma obtusa (Willd.), Britt. 



Camden : In the Delaware River Martindale, C. E. Smith. 

 Forma latifolia (Willd.), Britt. 



Camden : In the Delaware River Martindale. 

 Forma hastata (Pursh), Britt. 



In wet places. Common throughout the State. 

 Forma angustifolia (Engelm.), Britt. 



Burlington : Quaker Bridge Leggett. Camden : Martin - 

 dale. 



Forma gracilis (Pursh), Britt. 



In pine-barren swamps ; frequent. Burlington : Quaker 

 Bridge Leggett ; Brown's Mills E. Diffenbaugh. Atlantic : 

 Pleasant Mills Leggett ; along Mullica River C. E. Smith. 

 Mon mouth : Sandy Hook Martindale. 



S. calycina, Engelm. 



Bergen : Hackensack marshes and Fairview Austin. 



