Geothallus
Encyclopedia
Geothallus is a genus
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 of liverwort
Marchantiophyta
The Marchantiophyta are a division of bryophyte plants commonly referred to as hepatics or liverworts. Like other bryophytes, they have a gametophyte-dominant life cycle, in which cells of the plant carry only a single set of genetic information....

 in the Sphaerocarpaceae
Sphaerocarpaceae
Sphaerocarpaceae is a family of liverworts known as bottle liverworts. Approximately ten species are included in this family, most of them in the genus Sphaerocarpos, but one additional species in the genus Geothallus....

 family. It includes only the single species Geothallus tuberosus, which is endemic to southern California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

. Its natural habitat
Habitat
* Habitat , a place where a species lives and grows*Human habitat, a place where humans live, work or play** Space habitat, a space station intended as a permanent settlement...

 is hot desert
Desert
A desert is a landscape or region that receives an extremely low amount of precipitation, less than enough to support growth of most plants. Most deserts have an average annual precipitation of less than...

s. It is threatened by habitat loss.
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