Division Anthophyta which contains the Angiosperms group consists of seed-bearing plants that produce flowers, have endosperm within the seeds and produce fruits that contain the seeds. The division is further classified into two classes - Monocots and Dicots and the differences between the two classes are summarised in the diagram in this link.
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The key characteristic of reproduction of species in Division Anthophyta involves double fertilisation which will be discussed in Reproduction in Flowering Plants.