Thallus hairlike, forming
bushy or entangled masses of filaments, light brown. Filaments uniseriate,
branching alternate. Plurilocular sporangia subulate or fusiform,
often terminating in a hair. chloroplast band-shaped. Occures on stones
and other algae, in littoral and sublittoral down to 10m depth. Rare,
widely distributed, multizonal species. |