| Classification | Fungi: Ascomycota: Erysiphales: Erysiphaceae: Erysiphe |
| Classification 1 | Fungi: Ascomycota: Erysiphales: Erysiphaceae: Microsphaera |
| Harvard University Herbaria Barcode(s) | 01122181 |
| Collector | A. B. Seymour |
| Country | United States of America |
| State | New Hampshire |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: New Hampshire: Hillsborough County: Temple |
| Locality | [no additional data] |
| Date Collected | 1908-09-26 |
| Container | Reliquiae Seymourianae |
| Host | on Quercus rubra |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/c9c84754-38bd-4821-b650-2bb285187888 |
| Harvard University Herbaria Barcode | 01122181 |
| Herbarium | FH |
| Previous ownership | Remainders from the collections of A. B. Seymour distributed by the Mycological Herbarium of the Bureau of Plant Industry, U. S. Department of Agriculture. 1940 |
| 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 | 1987-03-24 |
| Determination Remarks | [filed under] |
| Annotation Text | var. extensa |
| Family | Erysiphaceae |
| Determination | Microsphaera alni (de Candolle) G. Winter |
| Determined by | Seymour, Arthur Bliss |
| Determination Remarks | [label name] |
| Sex | not determined |
| Phenology | NotDetermined |
| Preparation Type | Packet |
| Preparation Method | Dried |
