The Collaborative International Dictionary
Pepper dulse
Pepper dulse \Pep"per dulse`\ (Bot.)
A variety of edible seaweed ( Laurencia pinnatifida)
distinguished for its pungency. [Scot.]
--Lindley.
Wiktionary
pepper dulse
n. (context Scotland English) A pungent edible seaweed, ''Laurencia pinnatifida''.