Alaria esculenta

from The Collaborative International Dictionary of English v.0.48

Badderlocks \Bad"der*locks\, n. [Perh. for Balderlocks, fr.
   Balder the Scandinavian deity.] (Bot.)
   A large black seaweed ({Alaria esculenta}) sometimes eaten in
   Europe; -- also called {murlins}, {honeyware}, and {henware}.
   [1913 Webster]