I found numerous suggestions for plants that clean the air in this question.

One of the plants mentioned is the boston fern. I have many ferns growing in our backyard, and managed to cultivate a few quite easily. However, I'm not sure that it's the right kind of fern. How can I be sure? Is this, in fact, the boston fern?

my fern

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It would appear to be a variety of Nephrolepis, but I'm not sure its actually the Boston fern (Nephrolepis exaltata bostoniensis) - it looks rather more like Nephrolepis cordifolia, though it seems to be a darker green than usual. Either way, both these ferns are listed as good at cleaning up air indoors.

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