| Name | Porphyra umbilicalis var. laciniata (Lightfoot) Ruprecht |
| Authorship | (Lightfoot) Ruprecht |
| Rank | Variety |
| Placed in | Porphyra umbilicalis Kützing |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Porphyra umbilicalis var. laciniata (Lightfoot) Ruprecht |
| Identification made in | [no date] (1) |
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