CATALOGUE OF CANADIAN PLANTS. 369 



Fraser opposite Lulu Island ; also on the Indian Eeservation at Kam- 

 loops and eastward up the South Thompson, and the whole length of 

 Shuswap Lake, and up the Spallumsheen River to, and beyond Bnderby, 

 B.C. 1889. (Macoun.) 



656. POTAMOCETON. 



(2480.) P. Pennsylvanicus, Cham. ; Gray, Man., ed. VI., 559. 



P. Claytonii, Tuckerman ; Macoun, Cat. IV., 82. 



In the Kaministiquia Eiver near Fort William, Lake Superior. 1889. 

 (Dr. Britton.) Riviere des Aulnais, Q. (St. Cyr.) 



(2434.) P. alpinus, Balbis (1804); Bennett, Letter, March 3, 1890. 

 P. rufescen*, Schrad. (1815) ; Macoun, Cat. IV., 83. 



" The specimens from < Ounalashka,' (Herb., Berlin) were named P. 

 microstachys, Wolfgang in Roem. & Schultze, Veg. Sys., Mant. 3, p. 360 

 (1827) ; but the specimens are only a var. (?) or form of P. rufescens, 

 Schrad. This name, P. rufescens, will .probably have to give way. 

 There are three, certainly, if not more, prior names; but it is not 

 settled yet which is the earliest. I have a Greenland specimen of P. 

 rufescens." (Bennett, 1888.) Anstey's Greek, Shuswap Lake ; and 

 Bonaparte River, B.C. (/. M. Macoun,.) Griffin Lake, Gold Range, 

 B.C., 1889. (Macoun.) 



(2435.) P. fluitans, Roth. ; Gray, Man., ed. VI., 560. 

 P. lonchites, Tuck. ; Macoun, Cat. IV., 83. 



Mr. Morong considers this P. lonchites or var. Americanus of that 

 species ; but Mr. Bennett, of Croydon, thinks it is P. pumilus, Wolfgang. 

 This would date from 1827. Roem. et Schultze, Sys. Veg. Mant. 3. 



A plant provisionally referred here is spoken of by Mr. Bennett, as 

 below : 



"Your plant (No. 21) is like a specimen from Silesia, in Prussia, 

 named ' P. natans var. prolixus, Koch, = P. serotinus, Shrad., but 

 your plant has the leaves narrower, and larger, and the stipules 

 shorter, and must be studied and described later. A further ex- 

 amination of your specimens shows them to be much like a plant in 

 Wallich's herb, from India, named ' P. didymus, Wall., Napalia, 1821 ;' 

 but there is tio fruit on his specimen. This, anyhow, seems to fall 

 under P. fluitans as an aggregate species. After a good deal of com- 

 paring with all the natans group, lean come to no other remit than 



