ɐ smˈɔːlɚ nˈʌmbɚɹ ɛɡzˈɪst æz lˈaɪkənz ænd ɐ sˈɪŋɡəl spˈiːsiːz, sˈɛnəkˌɑːkəm dʒˌiːoʊfˈɪləm, kæn fˈɔːɹm mˈaɪkɔɹˌaɪzəl ɐsˌoʊsɪˈeɪʃənz wɪð plˈænt ɹˈuːts.
A smaller number exist as lichens and a single species, Cenococcum geophilum, can form mycorrhizal associations with plant roots.