Hormosippon arcticus.

(Both the genus and the species are completely unknown in all the botanical databases, including algaebase. -Henriette)

This alga abounds in the Arctic regions and affords wholesome food, which is far preferable to the tripe de roche, as it has none of its bitterness or purgative quality.

Sturtevant's Edible Plants of the World, 1919, was edited by U. P. Hedrick.