The lineage of seed plants that includes all flowering plants, characterized in part by highly reduced gametophytic generations dependant on the sporophyte, the presence of vessel elements in the xylem, sieve tube elements with companion cells in the phloem, the enclosure of ovules within a protective structure called the ovary, and the production of elaborate strobili called flowers, which function to attract Traditionally divided into two classes, the monocotyledons and the dicotyledons, though it is now known that the dicots comprise a paraphyletic grouping. | Anthophyta Section of Lab 10 | Lab 12 - Reproduction in Seed Plants | Lab 13 - Flowers and Pollination