Actually I am not sure if this is a flower. It is a plant attached to a rock, from the Fort Worden beach yesterday. Do seaweeds flower? Some of them do change color at different times of year. This one is wearing fall and winter colors.
For Cee’s Flower of the Day.
NOAA’s What is Seaweed?
Wikipedia says yes, some seaweed flower: https://en.wikipedia.org/wiki/Seaweed.