As mentioned elsewhere on this web site, the trees found in NCR parks fall into two groups-those that form ectomycorrhizal associations and those that form endomycorrhizal associations. The fruiting bodies of ectomycorrhizal fungi are found only in forests that contain at least trees from the first group. For example, if the trees present include only tulip-tree, box elder, sugar maple and basswood-all of which are endomycorrhizal-then ectomycorrhizal fungi are going to be absent. On the other hand, if the forest contains such trees and oak and beech, then any search for the fruiting bodies of ectomycorrhizal fungi has a good chance of being successful

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