Pellaea sp.
Oops. The common name should read Sickle Fern. Cliff Brake is P.atropurpurea
Similar to Pellaea falcata, which is Australian but widley cultivated, so this could be an escape.
Lat: 41.15, Long: -8.61
Spotted on Oct 15, 2011
Submitted on Oct 15, 2011