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They are by no means the _longest_ plants, for there are certain _rattans_ or canes, climbing plants belonging to the Palm family, which may be 900 feet long, although their diameter is not more than two inches.[12] There are also certain Seaweeds in the Southern Ocean, off the coast of Chile, which attain a prodigious length of 600 feet (_Macrocystis pyriferus_, or "Kelp"). That is not so remarkable, for their weight is supported by other plants in the case of the rattans, and as regards the seaweeds, by the water in which they float.