Great photos Wolfgang. Can you add them to the database?
R. pallida & R. aizoon are considered to be the same plant, Prometheum aizoon.
Rosularia rechingeri is now Prometheum rechingeri
Rosularia sempervivum subsp. glaucophylla, instead of ssp.
For the database use subsp instead of ssp.
Rosularia chrysantha is now Prometheum chrysanthus subsp chrysanthus.
It sure does get confusing with all the name changes in the scientific worls.