Erysiphe flexuosa
- kingdom: Fungi
- phylum: Ascomycota
- class: Leotiomycetes
- order: Erysiphales
- family: Erysiphaceae
- genus: Erysiphe
- species: Erysiphe flexuosa
Belmont- Cambridge
- Lexington
- Somerville
- Watertown
Massachusetts
United States