| Name | Porphyra umbilicalis Kützing |
| Authorship | Kützing |
| Rank | Species |
| Placed in | Porphyra C. Agardh |
| Contains | Porphyra umbilicalis var. laciniata (Lightfoot) Ruprecht Porphyra umbilicalis f. linearis (Greville) Rosenvinge |
| Holdings | 79 Specimens held in the Harvard University Herbaria identified as Porphyra umbilicalis Kützing |
| Identification made in | [no date] (77), 1960 (1), 2018 (1) |
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