Sorry. This name is valid?
Yes, according to the Kew plantlist .... it has lots of synonyms too....
Armeria multiceps Wallr.
Armeria kochii Boiss.
Armeria leucocephala var. alpina Boiss.
Armeria leucocephala var. kochii (Boiss.) G.H.M.Lawr.
Armeria leucocephala var. multiceps (Wallr.) Mori
Armeria leucocephala subsp. multiceps (Wallr.) Arcang.
Armeria maritima var. multiceps (Wallr.) Bernis
Armeria multiceps subsp. meridionalis Arrigoni
Oh! Sorry, I didn't see Ron had put the link already.