| Classification | Peronosporaceae: Peronospora |
| Harvard University Herbaria Barcode(s) | 00079718 |
| Collector | |
| Country | United States of America |
| State | Massachusetts |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Massachusetts: Middlesex County: Cambridge |
| Date Collected | 1878-08-** |
| Habitat | Host: Ambrosia artemisiifolia |
| Host | Ambrosia artemisiifolia |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/fa87a45f-0866-4159-8df2-8e9f6fa9d295 |
| Harvard University Herbaria Barcode | 00079718 |
| Herbarium | FH |
| Previous ownership | Herb. W. G. Farlow |
| Family | Peronosporaceae |
| Determination | Peronospora halstedii Farlow |
| Determination Remarks | probably determined by W. G. Farlow authentic [is filed under name] [is label name] [is Current name] |
| Sex | not determined |
| Phenology | NotDetermined |
| Preparation Type | Packet |
| Preparation Method | Dried |
