References to the use of Erythroglossum laciniatum as food, in bread and cake, and as a side dish or topping, before 1997. Referred to as Porphyra laciniata (currently regarded as a synonym of Erythroglossum laciniatum *) in the book:
•Newton, L. Seaweed utilisation. London: Sampson Low, 1951, p. 99-100
* https://www.algaebase.org/search/species/detail/?species_id=347