Bialbero de Casorzo
The Bialbero de Casorzo (Italian: "double tree of Casorzo"), which is also known as Grana Double Tree, is a unique tree situated between Grana and Casorzo in Piemonte, Italy. It is a mulberry tree on which a cherry tree grows. The cherry tree rises well above the mulberry tree on which it stands.
Large Epiphytes like this one require the "upper tree" have a root connection to the ground, for example by growing down through a hollow trunk. A similar "double tree", consisting of a peach and a spruce in the Plitvice Lakes National Park in Croatia, was described in an edition of the Cosmos booklets[clarification needed] of the 1960s.
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