Prized white truffle

A symbiotic and hypogeous mushroom, it grows underground at depths that can range from a few centimetres to over a metre, in association with broadleaf trees (poplars, limes, oaks, etc.) in clayey soils, often along watercourses, in late summer and autumn-winter.
 The white truffle grows in marly-calcareous soils, where there are beech, hazel, Turkey oak, oak, downy oak, poplar, hornbeam, willow or lime trees[4].