21 



i6i. Potamogeton filiformis Pers. Syn. i : 152 (1805). 



162. Potamogeton foliosus Raf. Med. Rep. (II.) 5: 354 (1808). 



Potainoi:;eton paiiciflorus Pursh, Fl. Am. Sept. 121 (1814) 



163. Potamogeton foliosus Niagarensis (Tuckerm.) Morong, 



Mem. Terr. Club, 3: Part 2, 39 (1893). 



Potatnogeton Niagarensis Tuckerm. Am. Journ. Sci. (II.) 7: 



354 (1849)- 



164. Potamogeton gemmiparus (Robbins) Morong, Coult. Bot. 



Gaz. 5:51 (1880). 



Potamogeton pitsilltis var. (?) gemmiparus Robbins in A. Gray, 

 Man. Ed. 5, 489 (1867). 



165. Potamogeton heterophyllus Schreb. Spicileg. Fl. Lips. 21 



(1771). 



Potamogeton gramineus Fries, Novit. Ed. 2, 36 (1828), not L. 

 Potamogeton gramineus var. heterophyllus Fries, Novit. Ed. 2, 



35 (1828). 



166. Potamogeton heterophyllus graminifolius (Fries) Morong, 



Mem. Torr. Club, 3 : Part 2, 24 (1893). 



Potamogeton gramineus var. graminifolius Fries, Novit. Ed. 2, 



36 (1828). 



1 66a. Potamogeton heterophyllus longipedunculatus (Merat) 

 Morong, Mem. Torr. Club, 3 : Part 2, 24 (1893). 



Potamogeton longipedunculatus Merat. Fl. Paris (according to 

 A. Bennett). 



167. Potamogeton heterophyllus maximus Morong, Mem. Torr. 



Club, 3: Part 2, 25 (1893). 



168. Potamogeton heterophyllus minimus Morong, Mem. Torr. 



Club, 3: Part 2, 25 (1893). 



169. Potamogeton heterophyllus myriophyllus (Robbins) Mo- 



rong, Mem. Torr. Club, 3: Part 2, 24 (1893). 



Potamogeton gramineus var. myriophyllus Robbins in A. Gray, 

 Man. Ed. 5, 487 (1867). 



170. Potamogeton Hillii Morong, Coult. Bot. Gaz. 6: 290 (1881). 



171. Potamogeton Illinoensis Morong, Coult. Bot. Gaz. 5: 50 



(1880). 



172. Potamogeton interruptus Kitaibel in Schultes, Oest. Fl. Ed. 



2, 328 (1814). 



Potamogeton flabellatus Bab. Man. Bot. Ed. 3, 324 (1851). 



173. Potamogeton lateralis Morong, Coult. Bot. Gaz. 5 : 51(1880). 



174. Potamogeton lonchites Tuckerm. Am. Journ. Sci. (II.) 6: 226 



(1848). 



