Here we call Sanguisorba canadensis, Canadian burnet or White Burnet (Fam. Rosaceae). On the other side of the border it is called American burnet; we are all talking about the same species.

The reason I show the Canada Burnet is not only because the glorious flowering, but also as a continuation to the posts on Zigadenus elegans ssp. glaucus and Zigadenus companions. As mentioned in those posts, we can grow in our gardens many species that in their natural habitat prefer wet places.
Canada burnet can be found growing wild on river shores, stream banks, swamps, wet meadows and other wet locations. I personally never had the pleasure to encounter it in the wild, but I can vouch that it adapts perfectly to garden cultivation; maybe it will not grow to its maximum height (+/- 1.8 m).

Sanguisorba canadensis

Records mention that in various states of the US it is considered threatened or endangered. In general, given the general loss of wetlands the situations will probably become worse.

For Canada, I had to do a bit more research and it seems to be found only on the East side of the country: NS, NB, NF; I also found records from Quebec. There is a misrepresented record in E- BC flora under Sanguisorba canadensis with Sitka burnet as the common name, actually showing Sanguisorba stipulata.
Excellent pictures for the Canadian Burnet taken in the wild can be seen here:
https://inaturalist.ca/taxa/783544-Sanguisorba-canadensis/browse_photos

We offered seeds of Sanguisorba canadensis a few years ago and I will be very happy, if possible, to offer them again. But we have to patiently wait until September/October.
Sanguisorba canadensis makes a great addition to any garden with the grayish-green pinnate foliage and the late summer flowering with fragrant, fluffy, bottlebrush-like inflorescences which are visited by many pollinators.