Montanum Characteristics perianth segments somewhat emarginate or abruptly narrowed to an aristulate apex (awn or bristle)

 

Sisyrinchium Characteristics flowers small, regular or nearly so

Iridaceae Characteristics plants with stem and leaves, not thallus-like plants not aquatic flowers borne in a spathe perianth present, in two series of 3 segments each perianth conspicuous, at least the inner whorl brightly coloured sepals and petals usually alike flowers regular petals not deciduous petals variously coloured ovary inferior