| Name | Cercidium macrum I. M. Johnston |
| Authorship | I. M. Johnston |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Cercidium Tulasne |
| GUID | urn:lsid:ipni.org:names:485654-1 |
| Citation | 1924 Contr. Gray Herb. 70: 64 |
| Holdings | 7 Specimens held in the Harvard University Herbaria identified as Cercidium macrum I. M. Johnston |
| Identification made in | [no date] (2), 1922 (3), 1973 (1), 1974 (1) |