Cerulean Multiplication. Golden Blue Leaf Beetle, Chrysolina coerulans, on Phlomis fruticosa, Jerusalem Sage, Hortus Botanicus, Amsterdam, The Netherlands

Apparently Jerusalem Sage, Phlomis fruticosa, has no known medicinal uses. But here its leaves serve as a softly woolly bed for Cerulean Multiplication or Heavenly Reduplication. Two Golden Blue Leaf Beetles, Chrysolina coerulans, are seriously active in a Phlomic Dell in the Bright Spring Sun.

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