Contributions to Canadian Botany. 465 



elusion that it was a good species, and in this opinion he 

 is sustained by Dr. Edw. L. Greene, who has examined 

 the specimens collected on Sheep Mountain in 1895. The 

 above preliminary description is based on his diagnosis. 

 Prof. Macoun has seen the specimens labelled P. Plattensis, 

 var. pinnatisecta in the Grey Herbarium, and believes 

 them to be all referable here. 



Callitriche hamulata, Kurtz. 



Dr. Morong having examined the specimens referred 

 to this species (Macoun Cat. Can. Plants, Vol. II., p. 322,) 

 pronounced them to be C. verna, L. We have no authentic 

 Canadian specimens of C. hamulata. 



LUDWIGIA PALUSTRIS, Ell. 



Wet places, Sproat Lake, Vancouver Island, 1887. 

 (John Macoun.) Xot before recorded west of the Sas- 

 katchewan. 



Gayophytum ramosissimum, T. & G. 



Near Dog Lake, Okanagan Valley, B.C., 1895. (Jas. 

 Fletcher.) Xew to Canada. 



SAXTCULA. 



Following Mr. Bicknell's revision of the eastern species 

 of this genus, our herbarium specimens have been arranged 

 as below : — 



S. Marylaxdica, L. 



From New Brunswick and Nova Scotia west to Van- 

 couver Island. 



S. gregaria, Bicknell, Bull. Torr. Bot. Club, Vol. XXIL, 

 p. 354. 

 Near Belleville, Ont. (John Macoun) Wingham, Ont. 

 (J. A. Morton.) 



