| Name | Canthium glaucum subsp. frangula (S. Moore) Bridson |
| Authorship | (S. Moore) Bridson |
| Rank | Subspecies |
| Placed in | Canthium glaucum Hiern |
| Citation | 1992 Kew Bull. 47: 366 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Canthium glaucum subsp. frangula (S. Moore) Bridson |
| Identification made in | [no date] (1) |