Ferns and lycophytes have a relatively low level of endemism in New Zealand – only 46% of them are unique to the country. By contrast, 84% of seed plants are endemic. Few introduced ferns and lycophytes have become naturalised in the wild, and again, this contrasts with seed plants, where the number of naturalised species (about 2,500) is greater than native species (2,300).
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Te Ara - The Encyclopedia of New Zealand
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