| Classification | Fungi: Ascomycota: Erysiphales: Erysiphaceae: Erysiphe |
| Classification 1 | Fungi: Ascomycota: Erysiphales: Erysiphaceae: Microsphaera |
| Harvard University Herbaria Barcode(s) | 01122182 |
| Collector | [no data available] |
| Country | United States of America |
| State | Massachusetts |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Massachusetts: Essex County: Gloucester: Magnolia |
| Locality | [no additional data] |
| Date Collected | 1903-09-** |
| Host | on Quercus nigra |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/8683dad7-b541-4c4e-998a-3b0535e1b690 |
| Harvard University Herbaria Barcode | 01122182 |
| Herbarium | FH |
| Family | Erysiphaceae |
| Determination | Erysiphe extensa (Cooke & Peck) U. Braun & S. Takamatsu |
| Date Determined | 2025 |
| Determination Remarks | [current name] |
| Family | Erysiphaceae |
| Determination | Microsphaera extensa Cooke & Peck |
| Determined by | Braun, Uwe |
| Date Determined | 1987-03-16 |
| Determination Remarks | [filed under] |
| Annotation Text | var. extensa |
| Family | Erysiphaceae |
| Determination | Microsphaera alni var. extensa (Cooke & Peck) E. S. Salmon |
| Determination Remarks | [label name] |
| Sex | not determined |
| Phenology | NotDetermined |
| Preparation Type | Packet |
| Preparation Method | Dried |
