<div>The supplementary data provided consists of the treefiles of all the phylogenies produced and used to create the figures in the dissertation entitled "Reconsidering the taxonomy of <em>Sclerotinia</em> with special reference to<em> S. sclerotiorum</em>". The phylogenies (and treefiles) represent two ITS phylogenies of <em>Sclerotinia </em>species as well as gene trees for <em>Sclerotiniaceae </em>species and related taxa. The gene trees were based on partial gene sequences of calmodulin (CAL), glyceraldehyde-3-phosphate dehydrogenase (G3PDH), heat shock protein 60 (HSP60), internal transcribed spacer region (ITS), laccase 2 (LCC2), minichromosome maintenance complex component 7 (MCM7), RNA polymerase II second largest subunit (RPB2) and translation elongation factor EF-1 alpha (TEF1). A phylogeny based on the concatenated of all eight gene regions is also presented. A genome-based phylogeny using 883 Benchmarking Universal Single-Copy Orthologs (BUSCOs) extracted from the genome sequences of several <em>Sclerotiniaceae </em>species and related taxa is also deposited here.</div>