1 86 Wyoining Experiment Station. 



Sagittaria arifolia, (?) Nutt. in Herb. S. variabilis minor, Pursh. 



I have some hesitancy in referring it as above, but it is the best 

 disposition I can make of it at present. 



Collected in a marshy meadow stream near Lusk, July 21, 1894 

 (No. 577). 

 Sagittaria latifolia, Willd. Sp. PI. iv, 409 (1806). 



Probably rare; Wheatland, August 11, 1891, B. C. Buffum. 



NAIADACEiE. 



Triglochin maritima, L. Sp. PI. 339 (1753). 



Common in alkali marshes. 



Alkali Springs. July 30, 1894 (No. 745); also from Wind River, 

 Laramie and other localities. 

 Triglochin palustris, L. Sp. PI. 388 (1753). 



In similar locations; Wind River, August 8, 1894 (No. 759). 



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



In the Laramie River, August 9, 1895 (No. 1668.) 



CYPERACE^. 



Eleocharis corapressa, Sull. Am. Journ. Sci. Ixii, 50 (1842). E. acu- 

 ?iiinaia, (Muhl.) Nees. 



As yet only from the Big Horn Mountains, July 1892, B. C. 

 Buffum. 

 Eleocharis olivacea, Torr. Ann. Lye. N. Y. iii, 300 (1836). 

 Not infrequent in partially submerged ground. 

 Laramie, June 28, 1894 (No. 289); Cold Springs, July 14, 1894 

 (No. 455). 

 Eleocharis ovata, Roem. & Schult. Syst. ii, 152 (1817). 



Specimens in the World's Fair collection secured in 1892. 



Scirpus atrovirens, Muhl. Gram. 43 (1817). 



Very common in marshy ground about springs and ponds. 

 Mexican Mines, July 20, 1894 (No. 591); Muddy Creek, August 

 25, 1894 (No. 1109). 

 Scirpus lacustris, L. Sp. PI. 48 (1753). 



Rare; noted only at Cold Sprins^s, Fairbanks, July 14, 1894 (No. 

 454).; 



