Rupicapnos africana
This Fumitory like plant with fleshy, slightly glaucous leaves fooled me for ages until an excellent botanist friend identified it. It is found in both Morrocco in Africa and in southern Spain. The flowers can be purple, pink or white but only the white one flowers in Spain which is probably Rupicapnos africana ssp decipiens.
Walls of Bobastro Rock Church, Andalucia, Spain 27th March 2008
Added on 17th March 2015