There are 10,400 known species of ferns living in the world today. They vary widely in size — some tree ferns can grow to be over 40 ft. tall while some aquatic ferns can be remarkably tiny, measuring just a few inches in size.
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There are 10,400 known species of ferns living in the world today. They vary widely in size — some tree ferns can grow to be over 40 ft. tall while some aquatic ferns can be remarkably tiny, measuring just a few inches in size.