Description: The thallus of is species resembles a fungus, with broadly overlapping lobes that are olive brown to yellowish at the edges and free of the substrate. Thalli form nearly circular patches 1 mm thick and 2-6 cm (0.8-2.4 in) in diameter. This slow growing perennial has concentric growth lines visible on the lobes. Habitat:  This species is found on rock in the mid to low intertidal, including tidepools, and prefers protected to semi-exposed habitats. Similar taxa: Ralfsia spp.