22 



175- Potamogeton lonchites Novseboracensis Morong, Mem. 

 Torr. Club, 3 : Part 2, 20 (1893). 



176. Potamogeton lucens L. Sp. PI. 126 (1753). 



177. Potamogeton lucens Connecticutensis Robbins in A. Gray, 



Man. Ed. 5, 488 (1867). 



178. Potamogeton major (Fries) Morong, Mem. Torr. Club, 3: Part 



2, 41 (1893). 



Poiamogcton pusilliis var. inajor Fries, Novit. Ed. 2, 48 (1828). 

 Potainogeton Fries ii Ruprecht, Beitr. Pfl. des Russ. Reiches, 



4: 43 (1845)- 

 Potamogeton compress us J. E. Smith, Eng. Bot. 3 : t. 418 {\1()a,), 

 not L. 



179. Potamogeton Mysticus Morong, Coult. Bot. Gaz. 5 : 50 (1880). 



180. Potamogeton natans L. Sp. PI. 126 (1753). 



181. Potamogeton Nuttallii Cham. & Schlecht. Linna^a, 2: 226, t. 



6 J. 25(1827). 



Potamogeton Pentisylvanicus Willd. ; Cham. & Schlecht. Lin- 



nrea, 2: 227 (1827). 

 Pota7nogeto7i Claytonii Tuckerm. Am. Journ. Sci. 45 : 38 



(^843). 



182. Potamogeton Oakesianus Robbins in A. Gray, Man. Ed. 5, 



485 (1867). 



183. Potamogeton obtusifolius M. & K. Deutsch. Fl. i: 855 



(1823}. 



184. Potamogeton pectinatus L. Sp. PI. 127 (1753). 



185. Potamogeton perfoliatus L. Sp. PI. 126 (1753). 



186. Potamogeton perfoliatus Richardsonii A. Bennett, Britten's 



Journ. Bot. 27 : 25 (1889). 



Potamogeton perfoliatus var. lanceolatus Robbins in A. Gray, 

 Man. Ed. 5, 488 (1867), not Blytt, Norges Fl. (1861). 



187. Potamogeton praelongus Wulf. in Rom. Arch. 3: 331 (1805). 



188. Potamogeton pulcher Tuckerm. Am. Journ. Sci. 45 : 38(1843). 



189. Potamogeton pusillus L. Sp. PI. 127 (1753). 



190. Potamogeton pusillus Panormitanus (Biv.) Morong, Mem. 



Torr. Club, 3: Part 2, 46 (1893). 



Potamogeton Panormitanus Biv. Sic. PI. (1806-7). 



191. Potamogeton pusillus polyphyllus Morong, Coult. Bot. Gaz. 



5: 51 (1S80). 



192. Potamogeton pusillus Sturrockii A. Bennett, in Hook. Stud. 



Fl. E<1. 3, 435 (1884). 



193. Potamogeton Robbinsii Oakes, Hovey's Mag. 7: 180 (1841). 



