Can anyone ID this flower plant by the photo?
It seems like it's either a Paeonia brownii or Paeonia californicus.  According to Wikipedia, these are the only peony trees native to North America, but there aren't any that are native to Canada specifically.  I guess these are the closest you can get.  I added some images to hopefully help you out a bit.

https://en.wikipedia.org/wiki/Paeonia_brownii

https://en.wikipedia.org/wiki/Paeonia_californica