''Reboulia hemisphaerica'', the hemisphaeric liverwort or small mushroom-headed liverwort, is the only species of

liverwort The Marchantiophyta () are a division of non-vascular land plants commonly referred to as hepatics or liverworts. Like mosses and hornworts, they have a gametophyte-dominant life cycle, in which cells of the plant carry only a single set of g ...

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 cells of an organism have more than one pair of ( homologous) chromosomes. Most species whose cells have nuclei ( eukaryotes) are diploid, meaning they have two sets of chromosomes, where each set contain ...

cross between two varieties of ''R. hemisphaerica'', so not a distinct species. Subsequent lists and publications do not recognize it as distinct.

Riccardin C Riccardin C is a macrocyclic bis(bibenzyl). It is a secondary metabolite isolated from the Siberian cowslip subspecies '' Primula veris subsp. macrocalyx'', in '' Reboulia hemisphaerica'' and in the Chinese liverwort '' Plagiochasma intermedium'' ...

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