Vegetation of bird-manured and disturbed cliff habitats in Svalbard
Cerastio arctici-Saxifragion cernuae H. Hartmann ex Mucina et Daniëls in Mucina et al. 2016
Cerastio arctici-Saxifragion cernuae H. Hartmann ex Mucina et Daniëls in Mucina et al. 2016
coc03 | Hartmann (1980: 114, 118) provisionally described the alliance 'Cerastio-Saxifragion cernuae' (ICPN art. 3b) containing a 'Poa alpigena-Alopecurus alpinus-Gesellschaft' and a community with Poa pratensis and Festuca rubra. Hadač (1989: 146) published validly the former community as an association, the 'Poo alpigenae-Alopecuretum alpini Hartm. ex Hadač 1989' by choosing one relevé in Hartmann's table as the type. He also designated the latter association as the type of the alliance 'Cerastio-Saxifragion cernuae Hartmann 1980' and indicated three species characterizing the alliance. Seemingly, Hadač in so doing incidentally validated Hartmann's provisional name in providing all the needed elements. However, Hadač did not specify which species of the genus Cerastium is eponymous of the name of the alliance and Hartmann (l.c., in his table) did not differentiate C. arcticum from C. alpinum (ICPN art. 3g). Therefore, no incidental validation of the alliance occurred in Hadač (l.c.). Here, we validate the Hartmann's name by providing the missing condition in choosing C. arcticum as the name-giving taxon: Cerastio arctici-Saxifragion cernuae H. Hartmann ex Mucina et Daniëls all. nov. hoc loco; holotypus (hoc loco): Poo alpigenae-Alopecuretum alpini H. Hartmann ex Hadač 1989. The regional character species of the alliance are: Alopecurus magellanicus (syn. A. alpinus Sm.), Cerastium arcticum, Poa alpigena, Saxifraga cespitosa, S. cernua and S. hyperborea. (L. Mucina, F. Daniëls, J.-P. Theurillat) We suggest that the Cerastio-Saxifragion cernuae is conceptually different from the Cochleariopsion groenlandicae Hadač 1989. (L. Mucina, F. Daniëls).