''Reboulia hemisphaerica'', the hemisphaeric liverwort
or small mushroom-headed liverwort,
is the only species of
liverwort
Liverworts are a group of non-vascular land plants forming the division Marchantiophyta (). They may also be referred to as hepatics. Like mosses and hornworts, they have a gametophyte-dominant life cycle, in which cells of the plant carry ...
in the genus ''Reboulia''.
A possible second species ''Reboulia queenslandica'' (Stephani) M. Hicks was published in 1992,
but it was later determined to be a
polyploid
Polyploidy is a condition in which the biological cell, cells of an organism have more than two paired sets of (Homologous chromosome, homologous) chromosomes. Most species whose cells have Cell nucleus, nuclei (eukaryotes) are diploid, meaning ...
cross between two varieties of ''R. hemisphaerica'', so not a distinct species.
Subsequent lists and publications do not recognize it as distinct.
is a phenolic cyclic bibenzyl secondary metabolite isolated from ''R. hemisphaerica'',
as is marchantinquinone.
References
External links
*
* Marie L. Hicks. 2004. ''Bryophyte Flora of North America''
Reboulia
Aytoniaceae
Marchantiales genera
Monotypic bryophyte genera
{{Bryophyte-stub