20 
148. Sparganium androcladum fluctuans Morong, Bull. Torr. 
Club, 15: 78 (1888). 
Sparganium simplex var. fluitans Engelm. in A. Gray, Man- 
Ed. 5, 481 (1867), not Sparganium fluitans Fries. 
149. Sparganium eurycarpum Engelm. in A. Gray, Man. Ed. 2, 43¢ 
(1856). 
Sparganium ramosum American authors in part, not Hudson. 
150. Sparganium minimum Fries, Sum. Veg. 2: 560 (1846). 
Sparganium natans of authors, not L. 
151. Sparganium simplex Huds. Fl. Angl. Ed. 2, gor (1788). 
152. Sparganium simplex angustifolium (Michx.) Engelm. in A. 
Gray, Man. Ed. 5, 481 (1867). 
Sparganium angustifolium Michx. F). Bor. Am. 2: 189 (1803). 
NAIADACEZz.* 
1. ZOSTERA L. Sp. Pl. 968 (1753). 
153. Zostera marina L. Sp. Pl. 968 (1753). 
\ 
2. POTAMOGETON L. Sp. Pl. 126 (1753). 
154. Potamogeton alpinus Balbis, Misc. Bot. 13 (1804). 
Potamogeton rufescens 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 Zizti Roth, Enum. Pl. Germ. 1: 531 (1827). 
Lotamogeton lucens var. minor Nolte in Hans. Ex. No. 521, 
according to A. Bennett. 
157. Potamogeton confervoides Reichb. Ic. Fl. Germ. 7:13 (1845). 
Potamogeton trichoides A. Gray, Man. 457 (1848), not Cham. 
Lotamogeton Tuckermani Robbins; A. Gray, Man. Ed. 2, 
434 (1856). 
158. Potamogeton crispus L. Sp. Pl. 126 (1753). 
159. Potamogeton diversifolius Raf. Med. Rep. (II.) 5: 354 (1808). 
Potamogeton hybridus Michx. Fl. Bor. Am. 1: tor (1803), not 
Thuillier, Fl. Par. (1790). 
1592. Potamogeton diversifolius trichophyllus Morong, Mem. 
Torr. Club, 3: Part 2, 49 (1893). 
160. Potamogeton Faxoni Morong, Mem. Torr. Club, 3: Part 2, 
22 (1893). 
* Contributed by Dr. Thomas Morong. 
