ADDENDA. 



Page IT, next after Spergularia rubra, read — 

 9.* Spergula, L. 



arvensis, L. (Spurrey.) 



Sandy fields; Townsend. Rare. W. M. Canby, 

 June, 1860. 



Page 20, next after Rhus, read — 



typhma, L. (Staghorn Sumach.) 



Dry banks; Noxentown Pond. Rare. June, 1860. 



Page 51, next after Ilysanthes gratioloides, read — - 



Low muddy banks; Brandy wine Creek, between 

 high and low-water mark. Rare. July, 1860. 



Page 72, under Sparganium, and before simplex, read — 



Tnmofiiiun ; Hitch J>4*4*+**p QL C"4 € f$<f 4 ""%i* + 

 Muddy banks; Shellpot Greek, &c. 'Frequent. July. 



Page 74, under Sagittaria, and next after pusilla, read — 

 calycina, var. spongiosa, Eng. 



Muddy banks of Shellpot Creek, &c. Frequent. 

 July, 1860. Described only in Dr. Torrey's re- 

 port of the Botany of the Mexican Boundary, 

 p. 212. 



