| Classification | Peronosporaceae: Peronospora |
| Classification 1 | Peronosporaceae: Plasmopara |
| Harvard University Herbaria Barcode(s) | 00079717 |
| Type Status | Lectotype |
| Collector | B. D. Halsted |
| Country | United States of America |
| State | Massachusetts |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Massachusetts: Suffolk County: Boston |
| Locality | Bussey Woods [Jamaica Plain] |
| Date Collected | 1876-05-** |
| Host | Eupatorium purpureum [Eutrochium purpureum] |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/59eac5e0-1349-438f-b92b-9368588d0cfd |
| Harvard University Herbaria Barcode | 00079717 |
| Herbarium | FH |
| Previous ownership | Herb. W. G. Farlow |
| Family | Peronosporaceae |
| Type Status | Lectotype |
| Lectotype of | Peronospora halstedii Farlow |
| Verified by | O. Constantinescu |
| Date Determined | 1983-11-** |
| Determination Remarks | This is the first specimen cited by Farlow and fully agrees with the description |
| 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. Constantinsecu |
| Date Determined | 1983-11-** |
| Determination Remarks | [current name] |
| Sex | not determined |
| Phenology | NotDetermined |
| Preparation Type | Packet |
| Preparation Method | Dried |
| Item Remarks | microscope slide in packet |
