The Collaborative International Dictionary
Porphyra vulgaris
Laver \La"ver\ (l[=a]"v[~e]r), n. The fronds of certain marine alg[ae] used as food, and for making a sauce called laver sauce. Green laver is the Ulva latissima; purple laver, Porphyra laciniata and Porphyra vulgaris. It is prepared by stewing, either alone or with other vegetables, and with various condiments; -- called also sloke, or sloakan.
Mountain laver (Bot.), a reddish gelatinous alga of the genus Palmella, found on the sides of mountains