liliidae: one of four subclasses or superorders of Monocotyledones; comprises 17 families including: Liliaceae; Alliaceae; Amaryllidaceae; Iridaceae; Orchidaceae; Trilliaceae
class: (biology) a taxonomic group containing one or more orders
mossy saxifrage: tufted or mat-forming perennial of mountains of Europe; cultivated for its white flowers