Asclepias speciosa Torrey 

Asclepias ovalifolia Decaisne 

Asclepias viridiflora var. linearis (A. Gray) Fernald 

Green Milkweed = Asclepias viridiflora Raf. (Milk Oozing Out) 

Coalhurst, AB. Bylaws, 1986 

County of Warner, AB. Bylaws, 1995 

Key to plants of the farming and ranching areas of the Canadian prairies, A 

The medical chronicle, or, Montreal monthly journal of medicine & surgery. Vol. 3, No. 9 (Feburary, 1856) 

Canada medical record. Vol. 12, no. 3 (December, 1883) 

Canada medical record. Vol. 7, no. 2 (November, 1878) 

59 Years with Indians and settlers on Lake Winnipeg 

Newfoundland in 1842 : a sequel to "The Canadas in 1841" 

Lethbridge, Alberta, Bylaws, 1980 

Handbook of Indians of Canada: published as an appendix to the tenth report of the Geographic Board of Canada