| Classification | Fungi: Ascomycota: Erysiphales: Erysiphaceae: Erysiphe |
| Classification 1 | Fungi: Ascomycota: Erysiphales: Erysiphaceae: Microsphaera |
| Harvard University Herbaria Barcode(s) | 01122188 |
| Collector | L. Bonar |
| Country | United States of America |
| State | California |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: California: Santa Clara County: Palo Alto |
| Locality | Jasper Ridge, Stanford University |
| Date Collected | 1923-09-30 |
| Container | California Fungi |
| Host | On Quercus kellogii Newb. |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/b6080803-e771-4611-b33d-afb1d97378c8 |
| Harvard University Herbaria Barcode | 01122188 |
| Herbarium | FH |
| Previous ownership | [ex] Herbarium of the University of California |
| Family | Erysiphaceae |
| Determination | Erysiphe extensa (Cooke & Peck) U. Braun & S. Takamatsu |
| Determination Remarks | [current name] |
| Family | Erysiphaceae |
| Determination | Microsphaera extensa Cooke & Peck |
| Determination Remarks | [filed under] |
| 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 |
