Bryophytes are the most primitive point on earth. They can live only were good supply of water is at. Its a spore plant and doesn't have any transport tubes. Two examples of bryophytes are livewort and homwort.
Gymnosperms are land plants that exposes their seeds. They have true roots and woody stems. Two examples of Gymnosperms are Ginkgos and Cycads.
Angiosperms are flowering plants. They are the world's largest plant group. They have true roots and transport tubes. Two examples of angiosperms are flowers and cotyledons.