About Anemone trifolia subsp. trifolia
Anemone trifolia subsp. trifolia is a herbaceous plant that produces stems 10–30 cm tall. Each stem bears one single flower, which is most commonly white, and very rarely pale pink or pale bluish. Flowers measure 2 centimetres in diameter, with five to nine elliptical tepals, most frequently six. The fruit is a cluster of achenes, each 2 mm long. This taxon has leaves divided into three lanceolate leaflets, arranged into a single whorl of three leaves per stem; leaflet margins are toothed, but not lobed. Its whitish rhizome grows just below the soil surface, and it typically forms dense clonal colonies. Flowering occurs from April to June. The species can be distinguished from Anemonoides nemorosa by its white or pale blue anthers (compared to the yellow anthers of A. nemorosa) and its simple, unlobed lanceolate leaflets, which lack the deep lobing found in A. nemorosa. By contrast, the related subspecies A. trifolia subsp. albida has pendulous achenes. As a species, Anemonoides trifolia is very similar to Anemonoides nemorosa, but has a more restricted distribution across southern and central Europe. Its range extends from Portugal and Spain eastward to Hungary, and reaches locally northward to Finland, where only one small population is known. It grows in hardwood forests and on rocky sites, at elevations up to 1860 metres.
