Intermediate Polypody

A most gorgeous spring day! After dropping Alex at Barnack, where he was working for the day, I went to Tallington and Uffington churchyards, which were full of spring flowers - snowdrops, lesser celandines, primroses, sweet violets, daffodils and the snowy white flowers of common whitlow-grass. 

I could have posted an image of any one of them, but my favourite shot was of the sori of this Intermediate Polypody fern. The various polypodies can be tricky to identify, and ideally you have to examine the sporangia under the microscope. But the very yellow, oval sori are quite characteristic. This species is most often found on limestone walls although it can grow on trees with alkaline bark, such as ash.