Bryophyte, a simple plant with no flowers and no true roots. Bryophytes include mosses, liverworts, and hornworts. Most bryophytes have no vascular tissues (tissues for conducting fluids). Bryophytes grow on damp rocks and logs, beside streams, and in other moist places.
In liverworts and hornworts the plant body consists of a thallus, a simple structure with little or no division into distinct parts. Many mosses have simple leaves and stems and simple vascular tissues.
The bryophytes make up the division Bryophyta. The mosses make up the class Musci; the liverworts, class Hepaticae; and the hornworts, class Anthocerotae.