I often find this delicate little fern on or near basic rocks like limestone but there is a sub species which prefers acidic conditions too (ssp trichomanes). It is fairly common both in rocky countryside and in built up areas. This one is most probably ssp quadrivalens as the rocks in these parts are basic and ssp trichomanes has not been recorded form this area.

This sub species is fairly common throughout the British Isles.

Near Cilygroeslwyd 12th July 2004

Added on November 12th 2004, updated 17th October 2008, updated Feb 28th 2010