Marchantiales

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

See Classification

Marchantiales is an order of thallose liverworts that includes species like Lunularia cruciata, a common and often troublesome weed in moist, temperate gardens and greenhouses.

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.

Classification

100 μm
Palisade layer
Cross section through a marchantialian thallus.

References

  1. ^ Limpricht, G. (1877 "1876"). "Lebermoose". In Cohn, F.. Kryptogamen-Flora von Schlesien. 1. pp. 225–352. 
  • 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 links



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Look at other dictionaries:

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  • Marchantiales — prop. n. An oder of liverworts with gametophyte differentiated internally. Syn: order {Marchantiales}. [WordNet 1.5] …   The Collaborative International Dictionary of English

  • Marchantiales — Marchantiales, ca. 400 hoch differenziert thallose Arten umfassende Ordnung der ⇒ Marchantiopsida. Das Brunnenlebermoos, Marchantia polymorpha, hat einen bis 2 cm breiten, sich dichotom verzweigenden Thallus, der mit Initialzellgruppen wächst und …   Deutsch wörterbuch der biologie

  • Marchantiales — noun liverworts with gametophyte differentiated internally • Syn: ↑order Marchantiales • Hypernyms: ↑plant order • Member Holonyms: ↑Hepaticopsida, ↑class Hepaticopsida, ↑Hepaticae, ↑ …   Useful english dictionary

  • marchantiales — mar·chan·ti·a·les …   English syllables

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  • order Marchantiales — noun liverworts with gametophyte differentiated internally • Syn: ↑Marchantiales • Hypernyms: ↑plant order • Member Holonyms: ↑Hepaticopsida, ↑class Hepaticopsida, ↑Hepaticae, ↑ …   Useful english dictionary

  • HÉPATIQUES — Les Hépatiques ou Hepaticopsida , Cryptogames chlorophylliens, constituent l’une des classes de l’embranchement des Bryophytes. Comme tous ces végétaux, elles présentent, au cours de leur vie, une alternance de phases (ou alternance de… …   Encyclopédie Universelle

  • Hepaticophyta — Hépatiques Marchantia sp …   Wikipédia en Français

  • Lunularia cruciata — Mondbechermoos Mondbechermoos (Lunularia cruciata) Systematik Unterabteilung: Lebermoose (Hepaticophytina) …   Deutsch Wikipedia

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