| Classification | Fungi: Ascomycota: Erysiphales: Erysiphaceae: Erysiphe |
| Classification 1 | Fungi: Ascomycota: Erysiphales: Erysiphaceae: Microsphaera |
| Harvard University Herbaria Barcode(s) | 01122146 |
| Collector | L. R. Mason |
| Country | United States of America |
| State | California |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: California: Alameda County: Oakland |
| Locality | Mills College |
| Date Collected | 1939-11-20 |
| Container | California Fungi |
| Host | On Quercus lobata Nee. |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/bcae7829-bc0c-4019-a72e-4f17cafcec7d |
| Harvard University Herbaria Barcode | 01122146 |
| Herbarium | FH |
| Previous ownership | [ex] Herbarium of the University of California |
| Family | Erysiphaceae |
| Determination | Erysiphe occidentalis M. Bradshaw, U. Braun & Quijada |
| Date Determined | 2025 |
| Determination Remarks | [filed under] [current name] |
| Family | Erysiphaceae |
| Determination | Compare Microsphaera abbreviata Peck |
| Determined by | Braun, Uwe |
| Date Determined | 1987-03-24 |
| Family | Erysiphaceae |
| Determination | Erysiphe abbreviata (Peck) U. Braun & S. Takamatsu |
| Determination | |
| Determined by | Liu, Miao |
| Date Determined | 2024-06-** |
| Annotation Text | Mainly adaxial, effusive mycelia mat with abundant chasmothecia, appendages (55)70-120(130) um long, chasmothecia diam. 92-130 um, ratio 0.6-1.2; asci 50-60 x 50-56 um sessile or with a short stalk up to 6.5 um long, 2-5(6) ascospores, 19-23 x 11-14 um. Microphotos were taken (unpublished). |
| Family | Erysiphaceae |
| Determination | Microsphaera alni (de Candolle) G. Winter |
| Determined by | Miller, Vera A. Mentzer |
| Determination Remarks | [label name] |
| Sex | not determined |
| Phenology | NotDetermined |
| Preparation Type | Packet |
| Preparation Method | Dried |
