Truffles grow and mature underground near to the roots of some types of trees, specifically oaks and elm trees: the mushroom creates a symbiotic relationship with, called mycorrhiza, through which the precious sporocarp is produced. They are covered by an external wall called peridium, which can be smooth or textured, with a color that varies from light to dark. The inner part is called gleba and its color varies from white to black, from pink to brown. On its surface there is a veining that delimitates cavities, in which are submerged big cells, called aschii, which contain the spores.

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