The Common Polypody (Polypodium vulgare) is a species of fern.
This species inhabits woodlands and banks in Britain, generally on acidic soils.
Common Polypody - http://www.flickr.com/photos/qwertyqwertyqwerty/
This species is widespread in Britain, and in some locations it is common. This species appears in May, and will overwinter.
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Common Polypody Spores - http://www.flickr.com/photos/qwertyqwertyqwerty/