va A Trans. Acad. Sci. of St. Louis. 
ANTHOPHYTA. 
48. NAIADACELE. 
116. NAIAS L. Naiad. 
e 469: N, WLEXILIS Rostk. & Schmidt. Stagnant water, Greenwood,. 
July (Williams). 
117. RUPPIA L. Ditch grass. 
s 
170. R. occrIpENTALIS Watson. In Grand Lake (brackish water), 
abundant. Alliance Aug. 6. This is the form mentioned in the 
Catalogue under Ruppia maritima as probably belonging to the 
foreign variety peduiculata Hart. Mr. Morong writes: ‘* There 
Watson, but with some differences. The leaves are somewhat 
shorter, the peduncles much longer and the fruit somewhat 
smaller. This form has not hitherto been found this side of 
Canada.” (Webber.) 
a 
ead 
iv. 5) 
- POTAMOGETON JU. Pond weed. 
171. P. AMPLIFOLIUS Tuckerm. Cropsey’s Lake, Lincoln, July re 
ber). 
172. P. FLuITANS Roth. (P. lonchites Tuckerm. )e Streams, etc. An- 
selmo, Custer Co. July (Webber). 
173. P. OAKESIANUS Robbins. In re Thedford, Thomas Co., July 
ll. Arare find. Mr. Morong writes — “ It is the first time I have 
ever known this species to occur so far west. The most westerly 
locality known for it hitherto has been the Adirondack region in 
ebber. 
New York,.”’ 
174, P. PECTINATUS L. Lakes, etc., abundant. Fremont, July (Will- 
iams). Grand Lake, Alliance, Aug.; Thedford, Thomas Co.,. 
Aug. (Webber). 
175. P. SPIRILLUS Tuckerm, Liseom, July (Webber). 
176. P. zosteR&Z¥oLius Schum. Springy Lakes. Fremont, July; 
Greeley Center, July (Williams). 
49. HYDROCHARIDACEZ. 
119. ELODEA Michx. Water-weed. 
177. E. CANADENSIS Michx. Margins of Cold Lakes. Fremont, July 
(Williams). 
50. ALISMACEZE. 
120. SAGITTARIA L. Arrow head. 
178. 8. catycrva Engelm. Moist Banks, Greenwood, July (Will- 
iams). 
179. S. HETEROPH PHYLLA Pursh. Shallow water and muddy banks. 
Greenwood, oe — 
