California. It prefers water about 7 m to 10 m deep and exposed to the open sea and normal salinities, yet sheltered from full wave action.

Macrocystis integrifolia alternates heteromorphic phases from a macroscopic sporophyte to dioecious microscopic gametophytes. It has been studied as a plant fertilizer, increasing bean yields up to 24% and chemical studies indicate presence of phytohormone-like substances.

Growth

Macrocystis pyrifera is one of the fastest-growing organisms on Earth.

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