Like most native spring ephemerals, this wants moist soil in the spring and will go dormant when the trees leaf out and suck the moisture from the soil. It doesn't need moist soil when dormant.
Armitage gives its hardiness range as Z4-9.
The common name is rue-anemone.
I can find no primary sources using the other names described above as synonyms. "Wood anemone" is Anemone nemorosa. "Windflower" refers either to Anemone nemorosa or the entire genus Anemone. Wikipedia gives seven different taxa that are sometimes called "crowfoot", but does not include Anemonella/Thalictrum thalictroides---though its botanical family is sometimes called the crowfoot family, after the buttercups.
The flowers are fully and consistently double. They are often described as "green". Pale chartreuse is closer to the mark.
...Read More
I would describe the flowers on mine as pale lemon yellow, rather than white.