Peronospora trifoliorum
- kingdom: Chromista
- phylum: Oomycota
- class: Peronosporea
- order: Peronosporales
- family: Peronosporaceae
- genus: Peronospora
- species: Peronospora trifoliorum
Ushuaia
Tierra del Fuego
Argentina
Helsinki
Hollola
Lappeenranta
Sibbo
Central Finland
Saarijärvi
Ostrobothnia
Finland
Bayreuth
Königstein
Bavaria
Haiger
Hesse
Germany
Colorado City
Arizona
Golden
Colorado
Ames
Iowa
Amherst Center
Massachusetts
Minneapolis
Minnesota
Livingston
Montana
Cayuga Heights
East Ithaca
Ithaca
South Hill
New York
Wolf Creek
Utah
Madison
Wisconsin
Laramie
Wyoming
United States
Bollmora