149. 
ESE. 
152. 
153- 
158. 
159 
20 
. 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. 
Sparganium eurycarpum Engelm. in A. Gray, Man. Ed. 2, 430 © 
(1856). 
Sparganium ramosum American authors in part, not Hudson. 
. Sparganium minimum Fries, Sum. Veg. 2: 560 (1846). 
Sparganium natans of authors, not L. 
Sparganium simplex Huds. Fl. Angl. Ed. 2, 401 (1788). 
Sparganium simplex angustifolium (Michx.) Engelm. in A. 
Gray, Man. Ed. 5, 481 (1867). 
Sparganium angustifolium Michx. Fl. Bor. Am. 2: 189 (1803). 
NAIADACEZE.* 
I. ZOSTERA L. Sp. Pl. 968 (1753). 
Zostera marina L. Sp. Pl. 968 (1753). 
2. POTAMOGETON L. Sp. Pl. 126 (1753). 
. Potamogeton alpinus Balbis, Misc. Bot. 13 (1804). 
Potamogeton rufescens Schrad. in Cham. Ad. Fl. Ber. 5 (1815). 
. Potamogeton amplifolius Tuckerm. Am. Journ. Sci. (II.) 6: 
225 (1848 
Pottiiozetón angustifolius Berch. & Presl, Rost. 19 (1821). 
Potamogeton Zizii Roth, Enum. Pl. Germ. 1: 531 (1827). 
Potamogeton lucens var. minor Nolte in Hans. Ex. No. 521, 
according to A. Bennett. 
. Potamogeton confervoides Reichb. Ic. Fl. Germ. 7: 13 (1845). 
Potamogeton trichoides A. Gray, Man. 457 (1848), not Cham. 
Potamogeton Tuckermani Robbins; A. Gray, Man. Ed. 2, 
434 (1856). 
Potamogeton crispus L. SCH Ph 126 (1753). 
Faohunogeton ds diversifolius Raf. Med. Rep. (II.) 5: 354 (1808). - 
Potamogeton hybridus Michx. Fl. Bor. Am. 1: 101 (1803), not 
Thuillier, Fl. Par. (1790). 
159a. Potamogeton diversifolius trichophyllus Morong, Mem. 
160. 
Torr. Club, 3: Part 2, 49 (1893). 
Potamogeton Faxoni Morong, Mem. Torr. Club, 3: hee 2, 
22 (1893). 
* Contributed by Dr. Thomas Morong. 
