1) Family laminariaceae 2) Protoctist family 
Laminariaceae are a family of seaweeds, classified as brown algae. The table indicates the genera within this family. The family includes the largest known seaweeds: Nereocystis and Macrocystis. ...
[n] - large family of marine brown algae including many economically important large kelps chiefly of northern waters
family Laminariaceae noun large family of marine brown algae including many economically important large kelps chiefly of northern waters