Photographed (45x) ECM morphotypes sampled from American chestnut root tips from a reclaimed mine site in Dresden OH, USA. Panels display the following that were matched to vouchered genera sequences in GenBank: Panel (a) Cenococcum sp. on C. dentata, Panel (b) Cortinarius sp. on hybrid BC1F3, Panel (c) Scleroderma sp. on hybrid BC2F3, and Panel (d) Russula sp. on C. dentata. Bar = 1 mm.