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Anthophyta213 - Anthophyta 1 Anthophyta Our first three...

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Anthophyta - 1 Anthophyta Our first three units of Biology 213 introduced us to reproduction, development, structure and functioning of the flowering plants, which are all within the phylum, Anthophyta. The flowering plants are also known as the angiosperms, or protected seeds, because their seeds are enclosed within the ovary tissue that develops into the fruit. In contrast, the seed plants just discussed, the gymnosperms ("naked" seeds), do not enclose seeds within a protective fruits. The Anthophyta, until a few years ago were divided into two groups, the monocotyledons and dicotyledons, whose structural features were presented in earlier units. However, better genetic analysis has shown that several groups of angiosperms (generally those thought of as the "primitive dicots", have been separated into distinct groupings. To conclude our unit on plant diversity, we will briefly discuss the Anthophyte evolutionary relationships. Distinguishing Vegetative Features The angiosperms can be distinguished from the gymnosperms in the following ways: Xylem in flowering plants contains vessels as well as tracheids. Vessels are found only in flowering plants and in the Gnetophyta.
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