Bryophytes are non-vascular land plants that include mosses, liverworts, and hornworts. They were the first plants to colonize land but lack true vascular tissue. Bryophytes reproduce via spores within enclosed gametangia and sporangia rather than seeds. They are also called amphibians of the plant kingdom.
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kingdom plantae
2. Bryophyte is a traditional name used to refer to all embryophytes
(land plants) that do not have true vascular tissue and are therefore
called "non-vascular plants". Some bryophytes do have specialized
tissues for the transport of water; however, since these do not
contain lignin, they are not considered to be true vascular tissue. As
of 2014, it is uncertain whether bryophytes are a natural or
monophyletic group or a paraphyletic group, but the name is
convenient and remains in use as a collective term for mosses,
hornworts, and liverworts. Bryophytes produce enclosed
reproductive structures (gametangia and sporangia), but they
produce neither flowers nor seeds, reproducing via spores. The term
"bryophyte" comes from Greek 硫凌僚, Bryon, "tree-moss, oyster-
green" + 僚 - phyton "plant".
3. The division bryophyte, comprises the mosses, as well as liverworts and
hornworts. The bryophytes are thought to have been the first true plants. They
are also called amphibians of the plant kingdom.
4. The thallophytes (Thallophyta or Thallobionta) are a
polyphyletic group of non-mobile organisms traditionally
described as "thalloid plants", "relatively simple plants" or
"lower plants". They were a defunct division of Kingdom
Plantae that included fungus, lichens and algae and
occasionally bryophytes, bacteria and the Myxomycota.
They have a hidden reproductive system and hence they
are also called Cryptogamae (together with ferns), as
opposed to Phanerogamae. The thallophytes are defined as
having undifferentiated bodies (thalli), as opposed to
cormophytes (Cormophyta) with roots and stems.