I havn't got a clue!

Could this plant belong to the Brassicaceae family. The immature buds gives me that impression.

 

I ask could it be Cakile maritima?

 

I thought it looked like that also.

 

Cakile maritima does not look that hairy. Should be something else...

 

I noticed the hairs as well, but it might be related.

 

Check if it fits Aubrieta

 

Hi Andrey, I have checked Aubrieta but this plant doesn't seem to fit. Will keep on trying before sending the images to Naples botanical garden.

 

The Botanical Gdns of the University di Camerino replied to my email with photographs, that it is Arabis collina Subsp.Rosea D.C. Infact, in the very same area I have found many Arabis collina and A c. subsp. rosea.
Andrey, if we don't exchange messages before Christmas I now send you Christmas greetings to you and your family.

 

Grazie, Duffy! Buon Natale a voi!

Arabis collina looks alike, indeed. Although, your plant looks malnourished - probably, early spring or late autumn.

 

Late autumn and gowing in small crevice on rock wall. It was the plant's poor and undernurished appearance that caused doubts.