Description: Thallus is golden brown with multiple orders of branches, which are delicate, progressively narrower, and alternate, opposite or irregular. Thallus is very fine and reaches 20-40 cm (7-16 in) tall. Habitat: This annual grows epiphytically on other seaweeds, attached to rock, or forms free-floating mats in protected and estuarine habitats. The seaweeds Chordaria flagelliformis and Scytosiphon lomentaria are common hosts for this species. Similar taxa: Chordaria, Desmarestia viridis.