250 GEOLoaiCAL SURVEY OF CANADA. 



(McGill Coll. Herb.) Islands in Eiee Lake and along the river Trent at 

 Crow Bay; also, Lake Isaac and Eed Bay, Lake Huron. (Macoun.) 

 Vicinity of Hamilton, Ont. {Logic.) Niagara Falls and along the 

 Detroit Eiver. (Maclagan.) Near London, along the Thames. 

 (^Burgess.) Not uncommon throughout the prairie region and extend- 

 ing westward to the Pacific. (Macoun.) Prom Lake Huron to the 

 Arctic Circle and from Hudson Bay to the Pacific. (Hooher.) 



302. CAILLARDIA, Fours;eroux. 

 (1169.) C. aristata, Pursh. 



a. hicolor. Lam. Hook. Fl. I., 315. 

 Common on di-y soils from the eastern part of Manitoba to the Eocky 

 Mountains and in the dry interior of British Columbia. The variety 

 /?. of Hooker has been collected in the Eocky Mountains by Dr. Dawson. 

 The form from the Foot Hills of the Rocky Mountains has very large 

 flowei'S often over two inches across, the rays are yellow and nearly 

 all the leaves are entire. Another form has a very woolly involucre 

 and nearly all the leaves deeply pinnatified. The three forms are 

 limited as follows : 



(1) Flowers large, rays deep yellow and with a long limb, leaves 

 nearly all entire. 



(2) This form has also large flowers, but the rays have a tinge of 

 purple at the base and the outer bracts are long and taper pointed. 



(3) In this the rays are quite short and involucre and upper part of 

 the peduncle quite woolly, nearly all the leaves are more or less 

 pinnatifid. This form has a purplish disk and is always of small size. 



303. ACTINELLA, Pers. 



(IIYO.) A. acaulis, Nutt. 



Oalardia acaulis, Pursh. Fl. II., 743. 



Dry gravelly soil, prairie region. West Butte, on a dry hill, 49th 

 parallel ; Fossil Coulee, Milk Eiver Eidge. (^Dawson.) On the Missouri 

 Coteau, 49th parallel. (Burgess.) 



(IIYI.) A. Richardsonii, Nutt. 



Pieradenia, Richardsonii, Hook. Fl. I., 317. 



Dry gravelly hillsides in the prairie region. About Carlton on 

 the Saskatchewan. (Drummond.) On ridges west of Moose Moun- 



