•Mosses: 15,000 species.
•Mosses (plus hornworts and vascular plants) have stomata, important in water and gas exchange.
•Mosses are among the most common plants in northern climates (cover ~3% of land surface).
•Some species of bryophytes have water conducting tissues (hydroids, progenitors of tracheids), but they don’t have lignin. Maximum height ~ 50 cm (20 in).
•Moss sporophytes (like vascular plants) grow by apical cell division- a region at the growing tip provides an organized pattern of division, elongation, and differentiation.
•Sphagnum grows in swampy places; upper layers of moss compress lower layers that are beginning to decompose, forming peat; leads to formation of coal.