Aureophycus

Aureophycus is a genus of kelp native to the waters of Karamil Island in the Aleutians, comprising a single species Aureophycus aleuticus, formally described in 2008. Each frond is six feet (two meters) long by two feet (sixty cm) wide with a strong yellow vein running along each edge (central vein lacking). A 2013 study found the genus to be basal to Laminariales.