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

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