Umbilicus rupestris

Umbilicus horizontalis or Pennywort or Navelwort belongs to the Sedum family. The horizontalis refers to the flowers being held at near horizontal level as opposed to pendulous in the Umbilicus Rupestris variety.

It is common in crock crevices, cliffs and old walls. The flower in the bottom picture is dried out and from the previous year

You can click on the pictures to enlarge.