TRUFFLES MUSHROOMS BELONGING TO SEVERAL GENERA IN THE PEZIZALES INCLUDING TUBER AND TERFEZIA. FRUIT BODY OF THESE GROUPS OF MYCORRHIZAL MUSHROOMS HAS AN IRREGULAR GLOBOSE SHAPE AND THESE ECTOMYCORRHIZAL ASCOMYCETES ALSO HAVE SYMBIOTIC (MUTUALLY BENEFICIAL) RELATIONSHIP WITH THE LIVING ROOTS. CHOIROMYCES MEANDRIFORMIS HAVE MEDICINAL APPLICATION. IN THIS RESEARCH SOME ACCESSION OF TRUFFLES WERE COLLECTED FROM FORESTS OF KHORRAMABAD MOUNTAINS IN WEST OF IRAN. THE MORPHOLOGIC AND MICROSCOPIC CHARACTERS OF THE MUSHROOMS WERE STUDIED IN LABORATORY AND THESE INFORMATION'S WERE COMPARED WITH THE SPECIES CHARACTERS IN SCIENTIFIC RESOURCES. RECULTS SUGGEST THAT THIS ACCESSION IS CLOSELY RELATED TO CHOIROMYCES MEANDRIFORMIS.