Thallus form and type
Foliose and bushy Intertidal rocks
Infra littoral fringe and sub littoral zone, tide pools
Plants yellowish brown in colour, 30 - 40 cm tall, arising form small conical discs; primary axes terete, very short, irregularly and alternately branched; primary branches cylindrical, very smooth, with branches and branchlets; leaves thin, translucent, 2 - 6 cm long, 0.5 - 1.5 cm broad, longer and broader below, smaller and narrower towards the apices, margins sinuate dentate, apices narrow rounded mid rib prominent (Figs. a, b); vesicles stalked more or less spherical; receptacles richly branched, spinous, verrucose, antheridia and oogonia developing in different receptacles (Fig. c).
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