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Cirsium eriophorum, the woolly thistle, is a tall biennial plant native to Central and Western Europe. The large, globose flowers can be up to 7 cm (2.8 in) in diameter. Each flower contains many tubular florets, with long purple tubes and purple stamens, each with a spiny bract covered with white woolly hairs through which a spine projects. This woolly thistle was photographed in Kozara National Park, Bosnia and Herzegovina.Photograph credit: Petar Milošević