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 genetic information.
Metzgeriales is an order of liverworts. The group is sometimes called the simple thalloid liverworts: "thalloid" because the members lack structures resembling stems or leaves, and "simple" because their tissues are thin and relatively undifferentiated. All species in the order have a small gametophyte stage and a smaller, relatively short-lived, spore-bearing stage. Although these plants are almost entirely restricted to regions with high humidity or readily available moisture, the group as a whole is widely distributed, and occurs on every continent except Antarctica.
Riccia is a genus of liverworts in the order Marchantiales.
Takakia is a genus of two species of mosses known from western North America and central and eastern Asia. The genus is placed as a separate family, order and class among the mosses. It has had a history of uncertain placement, but the discovery of sporophytes clearly of the moss-type firmly supports placement with the mosses.
Targionia is a genus of liverworts in the order Marchantiales. It the only genus in the family Targioniaceae within that order. This genus has worldwide distribution in areas with a Mediterranean climate. That is, in regions with hot dry summers and cool wet winters.
Perssoniella vitreocincta is the only species of liverwort in the monotypic genus Perssoniella and family Perssoniellaceae. It is endemic to New Caledonia.
Vandiemenia ratkowskiana is the only species of liverwort in the genus Vandiemenia. It is endemic to Tasmania, Australia. Its natural habitat is subtropical or tropical dry forests.
Schroederiella is a genus of green algae in the family Scenedesmaceae.
Haplomitriopsida is a newly recognized class of liverworts comprising fifteen species in three genera. Recent cladistic analyses of nuclear, mitochondrial, and plastid gene sequences place this monophyletic group as the basal sister group to all other liverworts. The group thus provides a unique insight into the early evolution of liverworts in particular and of land plants in general.
Apotreubia is a genus of liverworts in the family Treubiaceae. There are four species, including: Apotreubia nana, which is found in subalpine New Guinea, and Apotreubia pusilla, which has a disjunct distribution between eastern Asia and British Columbia.
Franz Stephani was a German bryologist specializing in liverworts. This botanist is denoted by the author abbreviation Steph. when citing a botanical name.
Topelia is a genus of fungi within the family Stictidaceae.
Poeltiaria is a genus of lichen-forming fungi in the family Lecideaceae. It was circumscribed in 1984 by lichenologist Hannes Hertel, with Poeltiaria turgescens assigned as the type species.
Poeltidea is a genus of lichenized fungi within the family Lecideaceae. It contains two species: Poeltidea perusta and Poeltidea inspersa.
Poeltinula is a genus of lichenized fungi in the family Rhizocarpaceae.
Phyllothallia is a small genus of liverworts of the Southern Hemisphere. It is classified in the order Pallaviciniales and is the only member of the family Phyllothalliaceae within that order. Unlike most members of the Metzgeriales, Phyllothallia has a leafy appearance. The genus has a disjunct distribution, with the species Phyllothallia nivicola found in New Zealand while the other species in the genus, Phyllothallia fuegiana, occurs in Tierra del Fuego.
Makinoa crispata is the only species of liverwort in the genus Makinoa and family Makinoaceae. The genus Verdoornia was formerly included in this family, but has been transferred to the family Aneuraceae on the basis of recent cladistic analysis of genetic sequences.
Ptilidium is a genus of liverwort, and is the only genus in family Ptilidiaceae. It includes only three species: Ptilidium californicum, Ptilidium ciliare, and Ptilidium pulcherrimum. The genus is distributed throughout the arctic and subarctic, with disjunct populations in New Zealand and Tierra del Fuego. Molecular analysis suggests that the genus has few close relatives and diverged from other leafy liverworts early in their evolution.
Trichotemnoma is a genus of liverworts restricted to New Zealand and Tasmania, and contains a single species Trichotemnoma corrugatum. It is classified in the order Jungermanniales and is the only member of the family Trichotemnomataceae within that order. The generic name Trichotemnona was originally published in 1964, but that publication was invalid under the ICBN.
Grolleaceae is a monotypic family of liverworts belonging to the order Jungermanniales. The family consists of only one genus, GrolleaR.M.Schust.. It has only one known species Grollea antheliopsisR.M.Schust. from South America.
