A bee gathers nectar and pollinates a purple knapweed flower (Centaurea genus), at Passo Cibiana, Dolomites, part of the Southern Limestone Alps, Italy, Europe. Centaurea is a genus of hundreds of species of herbaceous thistle-like flowering plants (commonly called knapweed, starthistle, centaury, or centory) in the family Asteraceae. Centaurea are found only north of the equator. UNESCO honored the Dolomites as a natural World Heritage Site in 2009.
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