The North Hampshire Aspleniaceae

There are four species of the spleenwort family (Aspleniaceae) found in the wild in North Hampshire.  I've been looking out for the final one for some time and stumbled across Ceterach officinarum (rusty-back fern) on a wall on the footpath going east from the car park by Whitchurch library.  This wall also had also specimens of Asplenium trichomanes.  I had found this species before on a wall alongside the railway by the old station at Oakley on the site of Basingstoke Building Supplies.  I have found the other two species on the old Roman walls at Silchester.  Here are photos of the four species:

  Asplenium adiantum-nigrum

Asplenium ruta-muraria

 Asplenium trichomanes

 Ceterach officinarum