This is a modified protocol for extracting DNA from fungal myelium using the Sigma-Aldrich Extract-N-Amp Plant Kit published by J.M. U'Ren et al. (2016) Contributions of North American endophytes to the phylogeny, ecology, and taxonomy of Xylariaceae (Sordariomycetes, Ascomycota). Molecular Phylogenetics and Evolution 98: 210-232.