taxonomic update of erysiphe sect. erysiphe (erysiphaceae, helotiales) in iran using dna barcoding and phylogenetic analysis

Taxonomy and phylogeny of erysiphe sect. erysiphe (erysiphaceae, helotiales) in iran was revised. one hundred samples from the university of guilan mycological fungarium (gum) and the fungal reference collection of the ministry of jihad-e agriculture (iran), as well as newly collected specimens during 2019–2021, were investigated using morphology and its-lsu rdna sequence analysis. based on our findings, erysiphe sect. erysiphe has 22 accepted and two unknown species in iran viz.: e. aquilegiae, e. betae, e.  buhrii, e.  caulicola, e.  circaeae, e.  convolvuli, e.  cruchetiana, e. cruciferarum, e.  heraclei, e. howeana, e.  limonii, e. lycopsidis, e.  malvae, e.  mayorii,  e.  medicaginis, e.  paeoniae, e. pisi, e. polygoni, e. punicae, e. rumicicola, e.  sedi, e. urticae. e. sedi and e. paeoniae are new records for the funga of iran. in addition, mesostemma kotschyana (caryophyllaceae) is reported as a new host for e. buhrii. the occurrence of potential cryptic species on urtica spp. is discussed as well