I haven't tried eating it---let me check my book about Aboriginal uses of native plants--
OK so the Cree word for Prairie Sage translates to "good tasting cow plant" so I guess it is edible. Good for insect repellent, making a poultice for healing burns, drunk as a tea for kidney pain and ridding worms, as a diuretic and to treat bladder infections and much more.
Do you have this particular plant where you are? What is it used for down there?--in addition to burning for ritual use.