CATALOGUE OP CANADIAN PLANTS. *7T 



650. SACITTARIA, Linn. Gen. W61. (ARROW-HEAD) 



(2418.) S. variabilis, Engelm. ; Gray, Man. Ed. Ed. Y., 493. 

 ;S. aagittifoUa, Pursh, Fl. II., 395 ; Hook., Fl. II., 167. 

 Under its various forms this species extends across the continent 

 though it is apparently quite rare, if present at all, in British Columbia, 

 It seems to be common in all the eastern provinces, but has not been 

 separated into varieties, and hence no special reference can be made to- 

 them. Our specimens show the following varieties : — 



Var. obtusa, Engelm. ; Gray, Man. Ed. V., 493. 

 S. obtusa, Willd. ; Pursh, Fl. II., 396. 



Leaves large and obtuse, flowers dicEcious. Abundant in water in 

 the Bay of Quinte, at Belleville, Ont. {Macoun.) Oba Lake, Ont. 

 (B. Bell.) Vicinity of Ottawa, Ont. (_Ami.) 



Var. latifolia, Engelm.; Gray, Man. Ed. V., 493. 



S. latifolia, Willd. ; Pursh, Fl. II., 396. 



S. sagittifolia, var. macrophylla, Hook., Fl. II., 167. 



S. sagittifolia, Michx.. Fl. II., 189. 

 Campbellton, N.B. (Clialmers.') In lakes and rivers, not uncom- 

 mon, Hastings Co., Ont. (^Maccun.) N"orth-west coast, where it is 

 called " Wapatoo," and where the roots are eaten by the Chinooks, 

 {Hooker, Fl.) 



Var. hastata, Engelm. ; Gray, Man. Ed. V., 493. 



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

 S. hastata, Pursh, Fl. II., 396. 



This variety includes all the larger forms with acute and sagittate 

 leaves, and may be called the common variety throughout the country. 



There are three forms of it well represented in our herbarium. 



(a.) Has large very elongated leaves, with very acute and divaricate 

 lobes, flowers dicecious. Nation Eiver, at Casselman, near Ottawa, and 

 in Brigham's Creek, near Hull, Q. (Macoun.) London, Ont. {Burgess.) 

 Eiver St. Charles, Q. (St. Cyr.) 



(h.) This form is easily distinguished from (a), by its much 

 smaller and shorter leaves, abruptly acute or almost obtuse point, and 

 short very acute less divaricate lobes. Muskeg Island, Lake Winni- 

 peg. {J. M. Macoun.) In small streams, near the Hand Hills, Alberta, 

 {Macoun.) South Antler Creek, Assiniboia. {Burgess.) 



