| Name | Microcystis firma (Brébisson & Lenormand) Schmidle | 
| Authorship | (Brébisson & Lenormand) Schmidle | 
| Rank | Species | 
| Placed in | Microcystis Lemmermann | 
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Microcystis firma (Brébisson & Lenormand) Schmidle | 
| Identification made in | [no date] (1) | 
