San Diego County, California, US
Abundant in our coastal waters. Deciduous in autumn. Much more brown than S. natans when found in wrack lines.
Epiphytic - intertidal
Intertidal at Otstoia Island - on rock
The Chromista are a eukaryotic supergroup, probably polyphyletic, which may be treated as a separate kingdom or included among the Protista. They include all algae whose chloroplasts contain chlorophylls a and c, as well as various colorless forms that are closely related to them. These are surrounded by four membranes, and are believed to have been acquired from some red algae.