20 



148. Sparganium androcladum fluctuans Morong. Bull. Torr. 



Club, 15: 78 (1888). 



Sparganium simplex var. fluitans Engelm. in A. (jray, Man. 

 Ed. 5, 481 (1867), not Sparganiu7n fluitans Fries. 



149. Sparganium eurycarpum Engelm. in A. Gray, Man. Ed. 2, 430 



(1856). 



Sparganium ramosum American authors in part, not Hudson. 



150. Sparganium minimum Fries, Sum. \'eg. 2: 560 (1846). ' 



Sparganium natans of authors, not L. 



151. Sparganium simplex Huds. Fl. Angl. Ed. 2, 401 (1788). 



152. Sparganium simplex angustifolium (Mich.x.) Engelm. in A. 



Gray, Man. Ed. 5, 481 (1867). 



Sparganium angustifolium Michx. Fl. Bor. Am. 2: 189 (1803). 



NAIADACE^/== 



I. ZOSTERA L. Sp. PI. 968 (1753)- 



153. Zostera marina E. Sp. PI. 968 (1753). 



2. POTAMOGETON L. Sp. PI. 126 (1753)- 



154. Potamogeton alpinus Balbis, Misc. Bot. 13 (1804). 



Fotamogeton rufescejis Schrad. in Cham. Ad. Fl. Ber. 5 (1815). 



155. Potamogeton amplifolius Tuckerm. Am. Journ. Sci. (II.) 6: 



225 (1848). 



156. Potamogeton angustifolius Berch. & Presl, Rost. 19 (1821). 



Potamogeton Z/2// Roth, Enum. PI. Germ, i : 531 (1827). 

 Potamogeton lucens var. minor Nolte in Hans. Ex. No. 521, 

 according to A. Bennett. 



157. Potamogeton confervoides Reichb. Ic. Fl. Germ. 7: 13 (1S45). 



Potatnogeton trichoidcs A. Gray, Man. 457 (1848), not Cham. 

 Potamogeton Tuckermani Robbins ; A. Gray, Man. Ed. 2, 

 434 ^1856). 



158. Potamogeton crispus L. Sp. PI. 126 (1753). 



159. Potamogeton diversifolius Raf. Med. Rep. (II.) 5: 354 (1808). 



Potamogeton hybridus Michx. Fl. Bor. Am. i : loi (1803), not 

 Thuillier, Fl. Par. (1790). 

 159a. Potamogeton diversifolius trichophyllus Morong, Mem. 



'iorr. Clul). 3 : Part 2, 49 (1893). 

 lOo. Potamogeton Faxoni Morong, Mem. Torr. Club, 3 : Part 2, 



22(1893). 



* Contributed by Dr. Thomas Morong. 



