I try to get my hands on different Anemones for woodland. But I have never come across the North American species A. quinquefolia offered for sale, at least not in Europe. Is this a common wild plant "over there"? Or is it a little more like A. ranunculoides in Norway you find it "here and there".
Here are A. ranunculoides and nemorosa in my garden.
I am waiting for them now, but we got 5 inches of snow two days ago on top of the 1 1/2 ft we had.
In Minnesota and Wisconsin A. quinquefolia is a common woodland flower. I couldn't say for sure, but I would think it is common in the eastern half of the U.S.
This species is common here, but only in certain areas. In the town where I live, I see some properties (private "yards", but not grass or lawn areas) where there are many thousands of these in bloom in early spring. Unfortunately, they are all on someone's property, so, I cannot go and dig a plant or even collect seed without permission. So, I just enjoy the spring show from afar. Googling this species, it seems that many nurseries in the USA offer this Anemone species, possibly it is available elsewhere as well.
Thanks. The problem is often to find a nursery exporting and providing phytosanitary certificates.
Photos of Anemone quinquefolia can be seen on another NARGS Forum thread here: