Contributions to Canadian Botany, 327 



S. variabilis, var. gracilis, Macoun, Cat. Can. Plain-. 

 Vol. II., p. 78, in part. 



Eagle Hills, Alberta ; Sicamous, B.C. {John Macoun?) 

 South Thompson River, B.C. (Dr. G. M. Dawson.) 



S. LATIFOLIA, Willd. 



Monoecious, with the lower verticils fertile, or dioecious; 

 scape 1 to 12 dm. high, angled, simple or branched : 

 flowers large, 2 to 4 cm. wide, the petals white ; stamens 

 numerous, 25 to 35 ; fertile pedicels shorter than the 

 sterile ; bracts sometimes connate in the upper verticils, 

 acute, acuminate, or obtuse, not scarious ; achenium broadly 

 winged on both margins, 2.5 to 3.5. or rarely 4 mm. long, 

 with a lateral horizontal or curving beak \ to j its length, 

 sides usually smooth or with a costate angle curving 

 downward from the base of the beak, rarely with a sub- 

 epidermal resin passage on each face. 



Mr. Smith recognizes five forms of this species, two of 

 which with the species proper are found in Canada. 



S. latifolia, proper. 



S. variabilis, var. hastata, form a, Macoun, Cat. Can. 

 Plants, Vol. II., p. 77, in part. 



North Pond, and Mt. Stewart, Prince Edward Island ; 

 Xation Kiver, near Casselman, Ont. (John Macoun.) 

 Ottawa, Ont. (Wm. Macoun.) Little Buffalo Lake, 

 Sask. (Jas. M. Macoun.) 



Form a. 



S. variabilis, var. obtusa, Macoun, Cat. Can. Plants, Vol. 

 II., p. 77, in part. 



S. variabilis, veer, angustifolia, Macoun, Cat. ('an. Plants, 

 Vol. II., p. 78, in part. 



Campbellton, KB. (II. Chalmers.) Nation River at 



Casselman, Out. ; Belleville, Ont. {John Macoun.) 



