| Name | Porterella carnosula (Hooker & Arnott) Torrey |
| Authorship | (Hooker & Arnott) Torrey |
| Rank | Species |
| Placed in | Porterella |
| Citation | 1872 Prelim. Rep. U.S. Geol. Surv. Montana 488 |
| Holdings | 43 Specimens held in the Harvard University Herbaria identified as Porterella carnosula (Hooker & Arnott) Torrey |
| Identification made in | [no date] (33), 1991 (10) |