Raymond Stotler

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 only a single set of genetic information. The division name was derived from the genus name Marchantia, named after his father by French botanist Jean Marchant. It is estimated that there are about 9000 species of liverwort. Some of the more familiar species grow as a flattened leafless thallus, but most species are leafy with a form very much like a

Hornworts are a group of non-vascular Embryophytes (land plants) constituting the division Anthocerotophyta. The common name refers to the elongated horn-like structure, which is the sporophyte. As in mosses and liverworts, hornworts have a gametophyte-dominant life cycle, in which cells of the plant carry only a single set of genetic information; the flattened, green plant body of a hornwort is the gametophyte stage of the plant. Hornworts may be found worldwide, though they tend to grow only in places that are damp or humid. Some species grow in large numbers as tiny weeds in the soil of

Jungermanniopsida is the largest of three classes within the division Marchantiophyta (liverworts).

Haplomitriopsida is a 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.

Blasiales is an order of liverworts with a single living family and two species. The order has traditionally been classified among the Metzgeriales, but molecular cladistics suggests a placement at the base of the Marchantiopsida.

Phymatoceros is the only genus in the hornwort family Phymatocerotaceae and order Phymatocerotales. It includes only three species.

Solenostomataceae is a family of liverworts in the order Jungermanniales.

Moerckiaceae is a family of liverworts in the order Pallaviciniales. The plants are thallose, typically organized as a thick central costa (midvein), each side with a broad wing of tissue one cell in thickness. All species are dioicous.

Visit the page for more details.

Petalophyllaceae is a family of liverworts in the order Fossombroniales. Most species are thallose; that is, the plant is not differentiated into root, stem, and leaf. The thallus is typically small and bears lamellae on its dorsal surface that give it a ruffled, leafy appearance. The family includes two extant genera, Petalophyllum and Sewardiella.

Visit the page for more details.

Visit the page for more details.

Treubiaceae is a family of liverworts in the order Treubiales. Species are large and leafy, and were previously classified among the Metzgeriales.

Visit the page for more details.

Herzogianthaceae is a family of liverworts belonging to the order Ptilidiales. The monotypic family consists of only one genus: Herzogianthus R.M.Schust.. The genus name of Herzogianthus is in honour of Theodor Carl Julius Herzog (1880– 1961), who was a German bryologist and phytogeographer. The genus was circumscribed by Rudolf Mathias Schuster in J. Hattori Bot. Lab. vol.23 on page 71 in 1961. The genus is only found in New Zealand.

Visit the page for more details.

Visit the page for more details.

Leiosporoceros dussii is the only species in the hornwort genus Leiosporoceros. The species is placed in a separate family, order, and class for being "genetically and morphologically distinct from all other hornwort lineages." Cladistic analysis of genetic data supports a position at the base of the hornwort clade. Physical characteristics that distinguish the group include unusually small spores that are monolete and unornamented. Additionally, there are unique strands of Nostoc (cyanobacteria) that grow inside the plant parallel with its direction of growth. Unlike other hornworts with

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.

Visit the page for more details.