| Classification | Fungi: Ascomycota: Erysiphales: Erysiphaceae: Erysiphe |
| Harvard University Herbaria Barcode(s) | 00972997 |
| Collector | |
| Country | United States of America |
| State | Massachusetts |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Massachusetts: Middlesex County: Newton |
| Locality | [no additional data] |
| Host | on Alnus |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/6acb8632-8d72-4d04-ae39-4e200e1a3633 |
| Harvard University Herbaria Barcode | 00972997 |
| Herbarium | FH |
| Previous ownership | [ex] Herbarium of Roland Thaxter, Bequest, 1932; [ex] Herb. W. G. Farlow |
| Family | Erysiphaceae |
| Determination | Erysiphe aggregata (Peck) Farlow |
| Determination Remarks | [filed under] [label name] [current name] |
| Annotation Text | Erysiphella Pk. |
| Accession Number | FH 4440 |
| Sex | not determined |
| Phenology | NotDetermined |
| Preparation Type | Packet |
| Preparation Method | Dried |
