mycelial

/maɪˈsiliəl/
adjective
  1. Relating to or resembling the network of fine white threads (hyphae) that make up the main body of a fungus.
    • Under the microscope, the mycelial threads looked like a delicate web.
    • The mycelial network spreads underground, connecting different plants.
    • Mushrooms are the fruiting bodies of a much larger mycelial organism.