16.7 % of world vascular plant flora
||Rundel PW et al., Fire and Plant Diversification in Mediterranean-Climate Regions. Front Plant Sci. 2018 Jul 3 9 :851. doi: 10.3389/fpls.2018.00851 abstract & p.2 left column bottom paragraphPubMed ID30018621
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||Abstract: "Comprising the Mediterranean Basin, California, central Chile, the Cape Region of South Africa, and southwestern Australia, these regions share the unusual climatic regime of mild wet winters and warm dry summers. Despite their small extent, covering only about 2.2% of world land area, these regions are home to approximately one-sixth of the world vascular plant flora." P.2 left column bottom paragraph: "These five regions include the Mediterranean Basin, California, central Chile, the Cape Region of South Africa, and southwestern Australia (Figure 1) and share the globally unusual climatic regime of mild wet winters and warm dry summers. Although collectively covering only about 2.2% of world land area, they are home to approximately one-sixth of the global flora (primary sources)."