Thallus form and type
Foliose and bushy Intertidal rocks
Infra littoral fringe and sub littoral zone, tide pools
Plants dark brown in colour, up to 50 cm long, arising from disc like holdfasts; primary branches terete but compressed near the nodes; leaves linear-lanceolate or ovate, 0.3 - 2.5 cm long, 3 - 7 mm broad, serrate with obtuse apices and asymmetrical bases (Figs. a, b), costate, vesicles oval with flat winged petioles and long leaf like apicules, receptacles 5 - 10 mm long in racemose branches, serrate, spiny, ancipate-triquatrous and twisted (Fig. c).
The species of Sargassum are harvested from wild and used for alginate production in India. Another note worthy product from Sargassum in India is liquid seaweed fertilizer.
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