protoctist family - any of the families of Protoctista

Fucales, order Fucales - coextensive with the family Fucaceae

fucoid algae, fucoid - any of various algae of the family Fucaceae

rockweed - coarse brown seaweed growing on rocks exposed at low tide

genus Fucus - type genus of the family Fucaceae: cartilaginous brown algae

Ascophyllum, genus Ascophyllum - brown algae distinguished by compressed or inflated branchlets along the axis

genus Sargassum - a genus of protoctista