It has single broad, blades thin, sieve-like, profusely perforated, with numerous small holes. thallus gelatinous, firm when fresh but rapidly crumble.Thread like cells emerging from the pointed ends of star-shaped cells under the microscope with very thin contents located in the core or medulla. There are Small, round cells in several layers of the outermost parts. Tetrasporangia Scattered and also divided in a cruciate pattern. Plants rose red in colour.