brown and has a single, big “unribbed blade” that is sometimes cut into longitudinal
strips. Oar weed can sometimes grow up to 16.4 feet in length. Smaller oar weed grows
in the intertidal zone and subtidal zones. A long time ago, people burned down oar
weed to make soda ash, used for putting together soap and certain kinds of glass.
Today oar weed is used for algin, fertilizer and food.