There are two main types of vascular plants with seeds: gymnosperms and angiosperms. Gymnosperms include five phyla and have naked seeds contained in cones or scales, while angiosperms have seeds contained within fruits and flowers. They include one phylum, Anthophyta, which contains two classes: monocotyledons and dicotyledons. Monocots and dicots differ in terms of seed, leaf, flower, and vascular bundle characteristics.