Porphyra linearis Greville

Description: Delicate, linear, membranous, purple-brown fronds, to 200 mm long and 25 mm broad, usually simple with short stipe from basal holdfast; orange patches when reproductive.
Habitat: Zone-forming on rock in the upper intertidal and splash zone of semi-exposed and exposed shores, generally distributed; a winter and spring annual appearing on semi-exposed and exposed shores in November and persisting until February or March.
Link: AlgaeBase




