Nereocystis n. : A genus of gigantic seaweeds.

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Taxonomy
Nereocystis luetkeana, kelp, free encyclopedia, genus, species, centimeters, spore, kelp forests, bladder wrack, search, washed ashore, Kingdom, Phylum, Family, Greek, thick beds, rocks, blades.

Defination from the web:
Nereocystis has a holdfast of about 40 centimeters, and a single stipe, topped with a pneumatocyst containing carbon monoxide, from which sprout ... Nereocystis is the only kelp which will drop spore patches, so that the right concentration of spores lands near the parent's holdfast. ...