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Marchantiales is an order of thallose liverworts that includes species like Marchantia polymorpha, a widespread plant often found beside rivers, and Lunularia cruciata, a common and often troublesome weed in moist, temperate gardens and greenhouses.

Marchantiales
Marchantiales cf Conocephalum 20071111.jpg
Conocephalum conicum - a thallose liverwort
Scientific classification e
Kingdom: Plantae
Division: Marchantiophyta
Class: Marchantiopsida
Order: Marchantiales
Limpr., 1877[1]
Families

See Classification

As in other bryophytes, the gametophyte generation is dominant, with the sporophyte existing as a short-lived part of the life cycle, dependent upon the gametophyte.

The genus Marchantia is often used to typify the order, although there are also many species of Asterella and species of the genus Riccia are more numerous. The majority of genera are characterized by the presence of (a) special stalked vertical branches called archegoniophores or carocephala, and (b) sterile cells celled elaters inside the sporangium.

Contents

PhylogenyEdit

Based on the work by Villarreal et al. 2015[2]

Marchantiaceae

Marchantia

Bucegia

Preissia

Dumortieraceae

Dumortiera

Aytoniaceae

Cryptomitrium

Mannia

Asterella

Reboulia

Plagiochasma

Cleveaceae

Aitchisoniella

Clevea

Peltolepis

Athalamia

Sauteria

Monocleaceae

Monoclea

Conocephalaceae

Conocephalum

Oxymitraceae

Oxymitra

Ricciaceae

Ricciocarpos

Riccia

Targioniaceae

Targionia

Wiesnerellaceae

Wiesnerella

Monosoleniaceae

Monosolenium

Cyathodiaceae

Cyathodium

Corsiniaceae

Corsinia

Stephensoniella

Cronisia

Exormotheca

ClassificationEdit

Taxonomy based on work by Söderström et al. 2016[3] and synonyms from Collection of genus-group names in a systematic arrangement.[4]

Cross section through a marchantialian thallus.

ReferencesEdit

  1. ^ Limpricht, G. (1877 "1876"). "Lebermoose". In Cohn, F. Kryptogamen-Flora von Schlesien. 1. pp. 225–352.  Check date values in: |year= (help)
  2. ^ Villarreal; et al. (2015). "Divergence times and the evolution of morphological complexity in an early land plant lineage (Marchantiopsida) with a slow molecular rate". New Phytologist. 209 (4): 1734–46. doi:10.1111/nph.13716. PMID 26505145. 
  3. ^ Söderström; et al. (2016). "World checklist of hornworts and liverworts". Phytokeys. 59: 1–826. doi:10.3897/phytokeys.59.6261. PMC 4758082 . PMID 26929706. 
  4. ^ "Part 2- Plantae (starting with Chlorophycota)". Collection of genus-group names in a systematic arrangement. Retrieved 30 June 2016. 
  • Crandall-Stotler, Barbara J. & Stotler, Raymond E. "Morphology and classification of the Marchantiophyta". page 63 in A. Jonathan Shaw & Bernard Goffinet (Eds.), Bryophyte Biology. (Cambridge: Cambridge University Press:2000). ISBN 0-521-66097-1.
  • Grolle, Riclef (1983). "Nomina generica Hepaticarum; references, types and synonymies". Acta Botanica Fennica 121, 1-62.

External linksEdit