| Classification | Fungi: Ascomycota: Erysiphales: Erysiphaceae: Erysiphe |
| Classification 1 | Fungi: Ascomycota: Erysiphales: Erysiphaceae: Microsphaera |
| Harvard University Herbaria Barcode(s) | 01085181 |
| Collector | R. A. Harper |
| Country | United States of America |
| State | Illinois |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Illinois: Lake County: Lake Forest |
| Locality | [no additional data] |
| Date Collected | 1892-10-** |
| Host | On Corylus americana |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/cc820d05-9963-44b0-af87-f8fe119664ab |
| Harvard University Herbaria Barcode | 01085181 |
| Herbarium | FH |
| Previous ownership | [ex] Herbarium of A. B. Seymour |
| Family | Erysiphaceae |
| Determination | Erysiphe coryli-americanae M. Bradshaw |
| Determined by | Mitchell, James Kameron |
| Date Determined | 2025-03-18 |
| Determination Remarks | [filed under] [current name] |
| Family | Erysiphaceae |
| Determination | Microsphaera alni (de Candolle) G. Winter |
| Determination Remarks | [label name] |
| Family | Erysiphaceae |
| Determination | Microsphaera ellisii U. Braun |
| Determined by | Braun, Uwe |
| Date Determined | 1982-02-10 |
| Sex | not determined |
| Phenology | NotDetermined |
| Preparation Type | Packet |
| Preparation Method | Dried |
