Nom illégitime superflu pour Petrosedum x luteolum (Chaboiss) Grulich, 1984

Afferni (2015) proposed a new combination in Petrosedum (Petrosedum ×nicaeense). The name proposed by Afferni was
intended by the author as a new combination, but is actually a new name based on S. ×luteolum Chaboiss. Therefore it is
validly published under Art. 32.1 of ICN (McNeill et al., 2012) but, unfortunately, it is illegitimate and superfluous according
to Art. 52.1–2