Fungal diversity and its relationship to the future of forests
(PHYSorg.com Biology)

If you indulge in truffles, or porcini and chanterelle mushrooms, you have enjoyed a product of ectomycorrhizal fungi. Forming symbiotic relationships with plants-including pine, birch, oak and willow tree species-these fungi have existed for millions of years, their sprawling filaments supporting ecosystems throughout their reach.