Phylogeny of the Sclerotiniaceae (Ascomycota, Leotiomycetes, Helotiales), the sister group Rutstroemiaceae (represented by Lambertella species and “Sclerotinia” homoeocarpa), and the outgroup, Blumeria graminis (Leotiomycetes, Erysiphales).

The topology was estimated using Bayesian inference based on the combined sequence data of five genes. The tree was rooted using B. graminis. Bolded branches represent well-supported nodes with >90% support from 1000 maximum likelihood bootstrapped pseudoreplicates and >0.95 posterior probabilities. Support values for each node are listed in Table S29. Topologies recovered from single genes phylogenetic analyses were congruent with the concatenated gene tree topology. Top row Sclerotinia sclerotiorum, photos by H Lyon (left), LM Kohn (right). Left is apothecium emergent from sclerotium developed in vitro; right are apothecia associated with wild host, Ranunculus ficaria. Bottom row photos by AS Walker. Left is Botryotinia fuckeliana, sexual apothecia emergent from sclerotium developed in vitro; right, conidiophores bearing conidia produced by Botrytis cinerea on grapes.