Fountain liver moss ( Marchantia polymorpha )
|Cronquist , Takht. et W.Zimm.|
The class has few features in common. These are the thallous organization, a single-layer sporangia wall , and special oil bodies in chlorophyll-free cells. The rest of the structure is quite different in the individual subclasses.
The species of Marchantiidae have a complex thallus . Most species have air chambers inside the thallus and breathing pores. In their tissue there are oil bodies made of terpenes , which give them a typical scent. The Sphaerocarpidae have a partly lobed, partly winged thallus, and the Monocleidae have a very simple thallus organization. The term "complex liverworts", which is often used for the whole class, therefore only applies to the Marchantiidae.
The diploid sporophyte in Marchantiopsida is covered for a very long time by the wall of the archegonium and only appears shortly before the maturity of the meio spores . These are then pressed out of the spore chamber with the help of elaters .
The Marchantiopsida comprise 19 families, 32 genera and around 380 species in two subclasses:
- Subclass Sphaerocarpidae
- Order Sphaerocarpales
- Subclass Marchantiidae
- Jan-Peter Frahm : Biology of Mosses . Spectrum Academic Publishing House, Heidelberg and Berlin 2001, ISBN 3-8274-0164-X
- Jan-Peter Frahm, Wolfgang Frey , J. Döring: Moosflora . 4th, revised and expanded edition (UTB for Science, Volume 1250). Ulmer, Stuttgart 2004, ISBN 3-8001-2772-5 (Ulmer) & ISBN 3-8252-1250-5 (UTB)
- Wolfgang Frey, Eberhard Fischer, Michael Stech: Bryophytes and seedless Vascular Plants . In: Wolfgang Frey (Ed.): Syllabus of Plant Families - A. Engler's Syllabus of Plant Families . 13th edition. tape 3 . Borntraeger, Berlin / Stuttgart 2009, ISBN 978-3-443-01063-8 , pp. 26-35 .