Orig. (Braun-Blanquet et al. 1939): Soldanelleto-Piceetum Volk 1939 mss. (Soldanella montana, Picea excelsa = P. abies)
Syn.: Sphagno-Piceetum Richard 1961, Mastigobryo-Piceetum sensu auct. bohem. non Br.-Bl. et Sissingh in Br.-Bl. et al. 1939 (pseudonym), Bazzanio-Piceetum sensu auct. bohem. non Br.-Bl. et Sissingh in Br.-Bl. et al. 1939 (pseudonym)
Formal definition: Picea abies cover > 25 % AND (Bazzania trilobata cover > 5 % OR (Sphagnum girgensohnii cover > 25 % AND group Bazzania trilobata)) NOT group Eriophorum vaginatum NOT group Oxalis acetosella NOT Abies alba cover > 5 % NOT Athyrium distentifolium cover > 5 % NOT Fagus sylvatica cover > 5 % NOT Pinus sylvestris cover > 5 %