320 GEOLOGICAL SURVEY OF CANADA. 



(14*72.) A. purpurascens, Linn. Purple Milkweed. 

 Maiden, and islands in Detroit River. (Maclagan.) 



Excluded Species. 



Asclepias obtusifolia, Michx. 



A. variegata, Linn. 



I have no authentic record of the discovery of these species and in 

 the absence of specimens, am totally unable to know what species 

 they represent. The latter was said to have been found at Hamil- 

 ton, Ont., by the late Judge Logie. 



392. ACERATES, Ell. (GREEN MILKWEED.) 

 (1473.) A. viridiflora, Ell. ' 



Asclepias viridiflora, Kaf. Hook. Fl. II., 53. 



On dry or gravelly soil from Niagara Falls westward to the Rocky 

 Mountains. Head of Lake Erie. (Goldie.) About Fort Carlton. 

 (Richardson.*) On the sand hills near Old Wives Lakes. (Macoun.) 

 Wood End, Souris River, 49th parallel. (Dawson.) 



Var. lanceolata, Gray. 



Asclepias mridiflora, Raf. Var. lanceolata, Hook. Fl. II., 53. 

 On the sand beaches of Point Pelee, Lake Erie ; also in numerous 

 places in Manitoba and North-west Territories. (Macoun.) On a sand 

 beach at Point Edward, foot of Lake Huron. (J. M. Maccun.) Banks 

 of the Red River. (Douglas.) About Fort Carlton. (Richardson.) 



Var. linear is, Gray. 



This variety has linear leaves and low stems ; umbels often solitary. 

 Winnipeg Valley. (Gray.) Banks of the Assiniboine River ; Pine 

 Creek on sand dunes ; and on sand hills at the confluence of the 

 Qu'Appelle and Assiniboine rivers. (Macoun.) 



LXIV. GENTIANACE^. GENTIAN FAMILY. 

 393. SABBATI A, Adns. (AMERICAN CENTAURY.) 



(14*74.) S. angularis, Pursh. 



Rich soil, western Ontario. (Gray.) This species as a Canadian 

 plant is unknown to me. 



