^8 GEOLOGICAL SUEVET OF CANADA. 



(c.) This is a shallow water form with small hastate leaves, scarcely 

 divergent, and very short lobes and always monoecious flowers. Grand 

 Valine, Gasp^, Q. ; Bay of Quinte, at Belleville, Ont. ; mouth of the 

 Nipigon Eiver, Lake Superior. (Macoun.) Missinaibi Eiver, Ont. 

 {B. Bell.) 



Var. diversifolia, Engelm. ; Gray, Man. Ed. V., 393. 



Some leaves of this form are lanceolate and others are sagittate. 

 Moose Mountain Creek, Man. (J. M. Macoun.) Ponds in the Eagle 

 Hills, near Battleford, N.W.T. (Macoun.) 



Tar. angustifolia, Engelm. ; Gray, Man. Ed. V., 393. 



The very long, narrow and divergent lobes of the narrow leaves 

 characterize this form. Marshes near Cape Blomidon, N.S. ; Nation 

 Eiver, at Casselman, near Ottawa, and in the Bay of Quinte, at Belle- 

 ville, Ont. (Macoun.) In shallow water at Port Dover, Ont. (Millman.) 

 London, and Port Cockburn, Muskoka Co., Ont. (Burgess.) 



Var. gracilis, Engelm.; Gray, Man. Ed, V., 393. 



S. sagittifolia, var. angustifolia, Hook., Fl. II., 167, in part. 

 S. gracilis, Pursh, FI. II., 396. 



Eiver St. Pierre, near Montreal, 1821. (Dr. Holmes.) Eiver St. 

 Charles, Quebec. (St. Cyr.) Ponds in the Eagle Hills, near Battle- 

 ford, N.W.T. (Macoun.) 



Var. pubescens, Engelm.; Gray, Man. Ed. V., 393. 

 Leaves pubescent as well as the upper part of the petiole and scape. 

 Bay of Quinte, at Belleville, Ont. (Macoun.) 



(2419.) S. calycina, Engelm. Var. spongiosa, Engelm.; Gray, 

 Man. Ed. V., 393. 



Near the head of the tide in Eichibucto Eiver and at Eotheaay ; 

 also Tobique Eiver, N.B. (Fowler, Oat.) 



(2420.) S. heterophylla, Pursh, Fl. IL, 396. 



S. sagittifolia, var. 3, angustifolia, Hook., Fl. II., 167, in part. 



Apparently rare eastward but not uncommon in waters bordering 

 on the St. Lawrence and Great Lakes. Abundant in numerous places 

 around Ottawa. (Fletcher, Fl. Ott.) Not uncommon in the Bay of 

 Quinte, at Belleville, and at Weller's Bay, Lake Ontario. (Macoun.) 



