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Saxifraga is a genus containing about 440 known species of Holarctic perennial plants, making it the largest genus in the family Saxifragaceae. They are commonly called saxifrages or stone-breakers. The Latin word Saxifraga means literally stone-breaker, from Latin saxum rock or stone + frangere to break. This refers to certain saxifrages' ability to settle in the cracks of rocks, which they may in fact wear down by bioerosion to the point of splitting.