commelinidae(n = noun.plant) subclass commelinidae - one of four subclasses or superorders of Monocotyledones; comprises about 19,000 species in 25 families of mostly terrestrial herbs especially of moist places including: Cyperaceae; Gramineae; Bromeliaceae; and Zingiberaceae;
is a kind of class
is a member of class liliopsida, class monocotyledonae, class monocotyledones, liliopsida, monocotyledonae, monocotyledones