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Isopyrum is a genus of four species of flowering plants of the family Ranunculaceae native to Eurasia. Isopyrum species have white flowers with five sepals and five petals.
The genus was first described in 1753 by the biologist Carl Linnaeus. In 1920, the genus Paraquilegia was segregated out from Isopyrum to contain plants that are more morphologically aligned with members of the genus Aquilegia (columbines). Several species from North America and eastern Asia formerly included in Isopyrum have also been transferred to the genera Dichocarpum and Enemion.
The Royal Botanic Gardens, Kew's Plants of the World Online (POWO) database, which accepts four species, considers Isopyrum as a solely Eurasian genus. POWO treats Isopyrum as native to Spain, France, much of Eastern Europe, and across Asia from Kazakhstan and Pakistan east through northern China to Korea and the far east of Russia. POWO also notes the genus as introduced in Denmark and Germany.
Text excerpted from the Wikipedia article Isopyrum by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
