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Spencer Collection, The New York Public Library. "Porphyra laciniata" The New York Public Library Digital Collections. 1853-09. https://digitalcollections.nypl.org/items/e94f4db0-0743-0135-f42f-2de41a442790
Spencer Collection, The New York Public Library. "Porphyra laciniata" New York Public Library Digital Collections. Accessed November 9, 2024. https://digitalcollections.nypl.org/items/e94f4db0-0743-0135-f42f-2de41a442790
Spencer Collection, The New York Public Library. (1853-09). Porphyra laciniata Retrieved from https://digitalcollections.nypl.org/items/e94f4db0-0743-0135-f42f-2de41a442790
<ref name=NYPL>{{cite web | url=https://digitalcollections.nypl.org/items/e94f4db0-0743-0135-f42f-2de41a442790 | title=
(still image)
Porphyra laciniata, (1853-09)
|author=Digital Collections, The New York Public Library |accessdate=November 9, 2024 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>