See text. Plants are living Organisms belonging to the kingdom Plantae. The flowering plants or angiosperms ( Angiospermae or Magnoliophyta) are the most widespread group Magnoliopsida is the Botanical name for a class of Flowering plants By definition the class will include the family Magnoliaceae, but its Gentianales are an order of Flowering plants included within the Asterid group of Dicotyledons The circumscription of Gentiales in the Cronquist In Biology, a species is one of the basic units of Biological classification and a Taxonomic rank.