sourceTaxonName: Melampsora occidentalis H. S. Jacks.
sourceTaxonPath: Fungi | Basidiomycota | Urediniomycetes | Uredinales | Melampsoraceae | Melampsora | Melampsora occidentalis
targetTaxonName: Populus trichocarpa
localityName: Yosemite National Park, Yosemite Valley