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About Boreal kingdom
The Boreal kingdom or Holarctic kingdom (Holarctis) is a floristic kingdom identified (1947) by botanist Ronald Good, which includes the temperate to Arctic portions of North America, Eurasia and North Africa. Its flora is inherited from the ancient supercontinent of Laurasia. However, parts of the floristic kingdom were glaciated during the Pleistocene and as a consequence have a very young flora. Cenozoic relicts found refuge in the southern and mountainous parts of the kingdom, especially in the Eastern Asiatic Region and southern North American Atlantic Region.
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