| Name | Microsphaera diffusa Cooke & Peck |
| Authorship | Cooke & Peck |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Microsphaera Léveillé |
| Contains | Microsphaera diffusa f. elongata U. Braun |
| Citation | 1873 ["1872"] Rep. (Annual) New York State Mus. Nat. Hist. 25: 95 |
| Holdings | 31 Specimens held in the Harvard University Herbaria identified as Microsphaera diffusa Cooke & Peck |
| Identification made in | [no date] (26), 1982 (1), 1983 (1), 1984 (2), 1985 (1) |