The thallus is delicate, soft, and tuft-like in appearance, with sparse and irregular branching. The lower parts of the thallus either spread horizontally or form a thin crust. The axes lie flat and generate upright axes with occasional and irregular branching. The vegetative axes are cylindrical, and when you look at cross-sections of these upright axes, you won’t find narrow rhizines. The portions of the axes where tetrasporangia are produced are compressed to become flat, and the very tips of these structures hold the sporangia. These reproductive structures, known as stichidia, can range from simple to having lateral secondary stichidia, which are pinnately branched. The tetrasporangia are arranged in a chevron pattern. These plants have a color that varies from light pink to red.