Anemone sylvestris has delicate, single white blossoms with soft yellow stamens that bloom on 18" wiry stems in spring. Also called Snowdrop Windflower, Anemone sylvestris may occasionally rebloom in the fall. Flowers are followed by fluffy white seed heads. These windflowers are rhizomatous plants that may be aggressive in loose soils. European native. Anemone sylvestris is grown best in part shade and organic, rich soil. This perennial will tolerate drier soils once established.