Parameter Tree:
EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PLANTS > MOSSES/HORNWORTS/LIVERWORTS

Definition:
Mosses and Liverworts belong to the Phylum Bryophyta, Class Musci
and Hepaticae, respectively. Bryophytes are relatively small plants that
grow in moist places on land -- on damp rocks and logs, on the forest
floor, in swamps or marshes, or beside streams and pools. In a moss, the
sporophyte stage of the life cycle is a relatively simple structure
consisting of three parts: a foot embedded in the "leafy" green
gametophyte, a stalk, and a distal capsule, or sporangium. The gametophyte
plants of some liverworts resemble mosses except that the "leaves" are
scaly in appearance, and the "stem" is prostrate. Other liverworts grow
as flat green structures lying on the substratum. 


Reference:
Adapted from: Gould, J. and W.Keaton. 1996. Biological Science. W.W. Norton and
Company. New York, New York.