Bryophytes are a group of non-vascular plants that include mosses, liverworts, and hornworts. They are typically small and grow in moist environments, often forming dense green mats. Bryophytes do not have true roots, stems, or leaves, but they do have structures that perform similar functions. These plants reproduce through spores rather than seeds, and they have a life cycle that includes both a gametophyte and a sporophyte stage. Bryophytes play an important role in ecosystems by helping to retain moisture, prevent soil erosion, and provide habitat for various organisms.