| Classification | Fungi: Ascomycota: Erysiphales: Erysiphaceae: Erysiphe |
| Harvard University Herbaria Barcode(s) | 00972998 |
| Collector | H. E. Parks |
| Country | United States of America |
| State | California |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: California |
| Locality | Redwood Peak |
| Date Collected | 1924 |
| Container | Fungi of California |
| Host | On Alnus rubra |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/83009a98-6e9e-49ef-ac11-77097fdfd2f4 |
| Harvard University Herbaria Barcode | 00972998 |
| Herbarium | FH |
| Previous ownership | [ex] Herbarium of the University of California |
| Family | Erysiphaceae |
| Determination | Erysiphe aggregata (Peck) Farlow |
| Determination Remarks | [filed under] [label name] [current name] |
| Sex | not determined |
| Phenology | NotDetermined |
| Preparation Type | Packet |
| Preparation Method | Dried |
