| Name | Phaeoceros laevis subsp. carolinianus (Michaux) Proskauer |
| Authorship | (Michaux) Proskauer |
| Rank | Subspecies |
| Placed in | Phaeoceros laevis (Linnaeus) Proskauer |
| Citation | 1954 Rapp. Commun. Parvenus Avant Congr. Sect. 7 & 8, VIII Internatl. Bot. Congr. 14-16: 69 |
| Holdings | 29 Specimens held in the Harvard University Herbaria identified as Phaeoceros laevis subsp. carolinianus (Michaux) Proskauer |
| Identification made in | [no date] (29) |