It seems to me that every leaf photo I upload to the Google search engine comes up as cannabis. Three main leaves attached to the stem, each of which is divided into, again three, each of which is also dented. Ottawa Valley. Weed?
Thank you! The flower has opened since I posted and Googling anemone canadensis brought up the same leaf and flower, although it is somewhat taller than that - just over a meter. I am still trying to identify all the wild plants/flowers around me. I am loath to remove anything green that shows up in the garden -- other than wild parsnip. Last month the yard was full of morels, but I was not brave enough to try them.