| Classification | Peronosporaceae: Peronospora |
| Classification 1 | Peronosporaceae: Plasmopara |
| Harvard University Herbaria Barcode(s) | 00079669 |
| Type Status | Syntype |
| Collector | J. C. Arthur |
| Country | United States of America |
| State | Iowa |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Iowa |
| Locality | Charles City |
| Date Collected | 1882-09-12 |
| Habitat | Host: Helianthus doronicoides |
| Host | Helianthus doronicoides |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/aa2051f5-e9ee-4b03-8ffa-5267049e44a3 |
| Harvard University Herbaria Barcode | 00079669 |
| Herbarium | FH |
| Family | Peronosporaceae |
| Type Status | Syntype |
| Syntype of | Peronospora halstedii Farlow |
| Verified by | O. Constantinescu |
| Date Determined | 1983-11-** |
| Taxon Reference | (for Peronospora halstedii Farlow) Proc. Amer. Acad. Arts 1883. 18: 72. |
| Family | Peronosporaceae |
| Determination | Plasmopara halstedii (Farlow) Berl. & De Toni |
| Determined by | O. Constantinescu |
| Date Determined | 1983-11-** |
| Determination Remarks | [current name] |
| Family | Peronosporaceae |
| Determination | Peronospora halstedii Farlow |
| Determination Remarks | [label name] |
| Sex | not determined |
| Phenology | NotDetermined |
| Preparation Type | Packet |
| Preparation Method | Dried |
