Range: Common and abundant. Bering Sea and Aleutian Islands to central California. Also in Russia.
Description: Olive-green to yellow-brown. Flattened thallus with a midrib and branches which divide into two parts. Blades to 1 cm wide. Some terminal branches are swollen and warty.
Ecology: on rocky shores in the mid- to lower-intertidal zones.
Notes: Eaten by periwinkles, false limpets, and isopods.
- Harbo, R. 1999. Whales to Whelks. Harbour Publishing. Madeira Park, BC. 245 p.