- Commelinidae, 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
--1 is a kind of class
--1 is a member of
--1 has members:Monocotyledones, class Monocotyledones, Monocotyledonae, class Monocotyledonae, Liliopsida, class Liliopsida Graminales, order Graminales; Musales, order Musales; Xyridales, order Xyridales, Commelinales, order Commelinales