The Bryophytes are the most elementary of the land plants and include the three groups, Anthocerotophyta commonly known as the hornworts, Hepaticophyta (Marchantiophyta) commonly known as the liverworts and Bryophyta commonly known as the mosses. They are distinguished from other plants by their persistent reproductive structures, the gametophytes, the short threads or rhizoids with which they anchor themselves to the ground and the fact that their motile sperm cells must swim to the egg, held in a flask-shaped organ in the gametophyte, through a fluid-filled protective tube of cells.

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Andrew's Moss Site
Photographs of mosses and a key to identifying the mosses and liverworts of northwest Europe.
Bryophyte - Wikipedia, the free encyclopedia
The bryophytes are those land plants that have tissues and enclosed reproductive systems but lack vascular tissue that circulates liquids. They neither flower nor produce seeds but reproduce via spores.
Bryophyte Classification
Provides diagrams showing the relationships between the major lineages of green algae and land plants.
Bryophyte Index
Images of bryophytes and their characteristics.
Bryophytes
Information about bryophytes, their importance, how to identify them and checklists for Hong Kong.
Bryophytes
Bryology at The Royal Botanic Gardens, Edinburgh.
Mosses and Liverworts, Simple Plants?
Article by Jan Parmentier on these plants and their reproductive structures, with photomicrographs.
Mosses, Liverworts and Hornworts in Wales
Produced by a member of the Countryside Council for Wales, this site gives an overview of what bryophytes are, the habitats where they can be found in Wales and their conservation.

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