| Name | Peronospora effusa var. major Caspary |
| Authorship | Caspary |
| Rank | Variety |
| Placed in | Peronospora effusa (Greville) Rabenhorst |
| Citation | 1855 Ber. Bekanntm. Verh. Konigl. Preuss. Akad. Wiss. Berlin 3: 330 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Peronospora effusa var. major Caspary |
| Identification made in | [no date] (1) |
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