Liverworts are part of the family of non-vascular plants called bryophytes that includes mosses, hornworts and liverworts. Non-vascular means they do not have specialized structures for the transport of water.
Marchantia Liverwort is a common thalloid form. It grows on hard surfaces, clinging with rhyzoids. Liverworts live in moist areas. This specimen is growing on a sheltered moist log at the water level on my garden float.
|Marchantia Liverwort with male antheridiophore reproductive structures.|
Bryophytes are the oldest living land plants and are believed to be a link that allowed prehistoric water plants to move onto the earth's surface. Today there are more than 20,000 species of bryophytes. Of those, about 7,000 are Liverworts. That's a lot of opportunity for worldwide colonization. -- Margy