| Name | Calicium hemisphaericum Howard |
| Authorship | Howard |
| Rank | Species |
| Placed in | Calicium Persoon |
| Citation | 1955 Bryologist 58: 54 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Calicium hemisphaericum Howard |
| Identification made in | [no date] (3) |