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In the ancient times when human being did not have the modern human’s scientific subjectivity and he could not perceive the reasons for effect of the plants, he considered them possessing holy and supernatural forces like other phenomena. Construction of gardens and cultivation of flowers and plants in all over the world indicate the holiness of the plants. In the past, plants especially trees were symbol of life, eternity, fertility and virtue and they were respected. Holiness of plants and the trees in ancient world and in ancient Iran cause plants is first ancestor of human. And because of this we can call "Mashi" and "Mashianeh" as holly plants which human is descended from them. Sometimes in popular legends among people, person's life is associated with a tree and withering and destruction of tree is linked with death. In many cultures of the world tree, evergreen tree, always off, always Prltaft Bymrgy with the fruits of eternity, the big trees are all trees. In many cultures of world, tree is always green, flourishing and delicate that its fruits are eternity and life lasting. A big tree which cause existence of other trees. In this article, it is tried to investigate some mythical and holy flowers and plants and related beliefs among different nations and religions