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Salt tolerance in cattails is amusing. Some are tolerant enough to live on the coast off Cape May, some die at the slightest contact with salt. In paleontological studies, I have seen the presence of cattail pollen used as proof of both sweet water and brackish water. This seems to be true of other aquatic weeds, too. There is coastal water hyacinth and Phragmites, and the inland versions are salt intolerant.

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14y ago

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