Odd looking plant...

[David M]

Whilst walking by Pennard Castle on the Gower the other day, I came across this decent-sized, stonecrop-like plant growing on the castle wall. Anyone any idea of the species?

[Trev Sawyer]

I think it is Navelwort (Umbilicus rupestris) David... Note the dimple (navel) in the centre of leaves where it attaches to stem underneath.

[David M]

Yes, that looks to be it, Trevor. Many thanks for your help.