Describing the four Plant Divisions

Bryophytes: are small, non-vascular plants, such as mosses, liverworts, and hornworts. They play a vital role in regulating ecosystems because they provide and important buffer system for other plants, which live alongside and benefit from the water and nutrients that bryophytes collect. Bryophytes do not have seeds or flower, instead they reproduce via spores.

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Tracheophytes: vascular plants from the phylum Tracheophyta which includes ferns, horsetails, club and spike mosses and true ferns as well as gymnosperms and angiosperms. Fern are non-seedbearing plans, they produce spores for dispersal and angiosperms. They are plants that contain a vascular system which consists of xylem (wood), which primarily takes in water and dissolved minerals, and phloem, which moves food such as sugar.

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Gymnosperm: any vascular plant that reproduces by means of an exposed seed, or ovule, and opposed to an angiosperm or flowering plant, whose seeds are enclosed by mature ovaries, or fruits. The seeds of many gymnosperms (literally "naked seeds") are borne in cones and are not visible.

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Angiosperms: seeds are enclosed and protected, reproduce by direct pollen transfer, has ovaries.