| Name | Microsphaera densissima (Schweinitz) Peck |
| Authorship | (Schweinitz) Peck |
| Rank | Species |
| Placed in | Microsphaera Léveillé |
| Citation | 1874 [1873] Rep. (Annual) New York State Mus. Nat. Hist. 26: 80 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Microsphaera densissima (Schweinitz) Peck |
| Identification made in | [no date] (1) |