The thallus has a dense and filamentous appearance, with branches that dichotomously split, sometimes being of equal length and sometimes unequal. The filaments feature nodes and compacted internodes, resembling holly. The tips of the ultimate branches are forked, with slightly curved cortical cells that are either square or rectangular, arranged in longitudinal rows. At the nodes, you can find spines, usually consisting of two cells. Tetrasporangia are arranged in whorls on each segment of the perial cells. These plants are red in color and grow in loose clusters or clumps. They have an upright, flame-like and stiff appearance, attaching to the substrate through rhizoids.