Johnson's Dictionary and Don describe Dianthus montanus M.Bieb. as bearing large, purple flowers, olive-coloured on the underside, with strongly-toothed petals.  Probably the same species as Dianthus chinensis L. which see.  Hortus Second relates Dianthus montanus to Dianthus seguièri Vill., synonym D. chinensis var. asper.  ‘The European extension of D. chinensis, perhaps a distinct species differing in the panicled flowers, and wide-spreading calyx bracts.’  [Hortus].