| Name | Collema flaccidum (Acharius) Acharius |
| Authorship | (Acharius) Acharius |
| Rank | Species |
| Placed in | Collema (Weber) F. H. Wiggers |
| GUID | urn:lsid:indexfungorum.org:names:383265 |
| Citation | 1810 Lichenogr. Universalis 647 |
| Holdings | 166 Specimens held in the Harvard University Herbaria identified as Collema flaccidum (Acharius) Acharius |
| Identification made in | [no date] (165), 2015 (1) |