Maidenhair Spleenwort Asplenium trichomanes is almost entirely confined to stonework and brickwork in Norfolk. After Rustyback (Asplenium ceterach), it is probably the most elusive of this group of ferns although it can be abundant in some locations.
Updated January 2019. Lime green circles and orange squares: 1987-1999 Green circles and dark red squares: 2000-2019
Maidenhair spleenwort is widely scattered but not particularly common - although it has been found so far in twelve 'new' 10k squares since 2000 it is yet to be re-recorded in fifteen.