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