88 GEOLOGICAL SURVEY OF CANADA. 



bears so many of the characteristics of pusillus. The ruddy tinge an 

 revolute leaves may be owing to the season or accidental circura stances. 



(2446.) P. mucronatus, Schrader. 



P. pusillus, var. major, Fries. ; Gray, Man. Ed. V., 489. 



P. obtusifolius, Macoun, Cat. No. 1737. 



Eather uncommon but very likely overlooked. St. Stephen, and 

 Little Eocher, N.B. (Fowler, Cat.) Brackish ponds, Salt Lake, Anti- 

 costi ; abundant in a brook, North Hastings, Oht. ; marshes at the 

 mouth of Nipigon Eiver, Lake Superior. (Macoun.) Muskeg Creek, 

 Lake Winnipeg, Man. ; and Missinaibi Eiver, Ont. (J. M. Macoun.) 

 Long Lake, and Eeed Lake, Assiniboia. {Macoun.) In the Eed Eiver 

 at Emerson, Man. {Prof. Fowler.) 



(2447.) P. rutilans, Wolfgang. 



In marshes at Ellis Bay, Anticosti, 1883 ; also in abundance in 

 marshes at the mouth of the Nipigon Eiver, near Eed Eock, Lake 

 Superior, 1884. (Macoun.) On South Twin Island, James Bay, 1887. 

 (J". M. Macoun.) These are the only known localities for this species 

 in America. 



(2448.) P. marinus, Linn.; Michx., Fl. I., 102. 



P. pectinatus, var. latifolius, Watson ; Macoun, Cat. No. 1739, var. 

 P. pectinatus, var. /?, Hook., Fl. II., 172. 



Chiefly in brackish marshes on the sea-coast and in the prairie region. 

 Brackish ponds, Salt Lake, Anticosti ; Madeline Eiver, Gaspe* coast, Q. 

 {Macoun.) Shore of the Gulf of St. Lawrence. (St. Cyr.) Missinaibi 

 Lake and Nelson Eiver. {R. Bell) Lake Mistassini, N.E.T. ; Moose 

 Mountain Creek, Man. (J. M. Macoun.) Common in the larger pools 

 throughout the prairie region. (Macoun.) Ten miles above Spence's 

 Bridge, B.C. {Fletcher.) Further examination will doubtless show 

 that much of the material now referred to P. pectinatus is really this 

 species. 



Var. Macounii, Morong. (MS.) 



This is a broad-leaved and very distinct form, and cannot be referred 

 to It. marinus, var. occidentalis, although near it, by Eev. T. Morong, 

 who names it as above. Brackish, and salt lakes, prairie region. Old 

 Wives Lakes, and in Crawling Yalley, south of the Hand Hills, Alberta. 

 (Macoun.) 



(2449.) P. pectinatus, Linn.; Pursh, Fl. I., 121. 



P. pectinatus, var. a., Hook., Fl. II., 172. 

 Widely distributed or confounded with P. marinus. In ponds at 



