The following are common in most parts of Ontario: squirrel-corn, Dutchman's breeches, blue cohosh, dog's-tooth violet, water-parsnip, catnip, and mallow.
"Ontario Teachers' Manuals: Nature Study"
Ontario Ministry of Education
Black cohosh; Black Snakeroot; Tall Bugbane Cimicifuga racemosa Flowers-Foetid, feathery, white, in an elongated wand-like raceme, 6 in.
"Wild Flowers Worth Knowing"
Neltje Blanchan et al