<Li> Magnoliophyta Cronquist, Takht . & W. Zimm . </Li> <Li> Magnolicae Takht . </Li> <P> The flowering plants, also known as angiosperms, Angiospermae or Magnoliophyta, are the most diverse group of land plants, with 416 families, approximately 13,164 known genera and c. 295,383 known species . Like gymnosperms, angiosperms are seed - producing plants . However, they are distinguished from gymnosperms by characteristics including flowers, endosperm within the seeds, and the production of fruits that contain the seeds . Etymologically, angiosperm means a plant that produces seeds within an enclosure; in other words, a fruiting plant . The term comes from the Greek words angeion ("case" or "casing") and sperma ("seed"). </P> <P> The ancestors of flowering plants diverged from gymnosperms in the Triassic Period, 245 to 202 million years ago (mya), and the first flowering plants are known from 160 mya . They diversified extensively during the Lower Cretaceous, became widespread by 120 mya, and replaced conifers as the dominant trees from 100 to 60 mya . </P>

Where does a flowering plant contains its seeds