Frøplantar















Frøplantar

Den mannlege blomen av Gnetum gnemon, eit medlem av Gnetophyta
Den mannlege blomen av Gnetum gnemon, eit medlem av Gnetophyta

Systematikk

Rike:

Plante Plantae

Underrike:

Viridiplantae

Infrarike:

Streptophyta

Overrekkje:

Landplantar Embryophyta

Rekkje:

Karplantar Tracheophyta

Underrekkje:

Frøplantar Spermatophytina

Frøplantar (Spermatophyta eller Phanerogamae) er ei plantesystematisk avdeling av plantar som set frø, i motsetnad til sporeplantar som formeirer seg med sporar. Dette er den største gruppa av nolevande plantar, med over 260 000 nolevande artar.[1]





Karplantar inndelt i frøplantar og andre grupper.


I botanikken har ein lenge delt frøplantane inn i dekkfrøa plantar (Magnoliophyta) og nakenfrøingar (Gymnospermae), som omfattar divisjonane Pinophyta (bartre), Cycadophyta (konglepalmar), Ginkgophyta (gingko) og Gnetophyta. Dei største familiane er marihand- og korgplantefamilien.


Dei eldste frøplantane ein har fossil frå er gruppa Pteridospermatophyta, desse er frå sein devontid.[2]



Divisjonar |


  • Pinophyta

  • Cycadophyta

  • Ginkgophyta

  • Gnetophyta

  • Magnoliophyta


  • Bennettitales †




Bakgrunnsstoff |



  • Divisjon: Frøplanter (Spermatopsida) ved miljolare.no


  • Frøplanter ved Biologisk Instittutt, UiO (uio.no)


  • Spermatophytes - Seed plants i Plant Systematics (2010)

av Michael G. Simpson



Kjelder |




  1. ↑
    Joel Cracraft, Michael J. Donoghue (red.)
    Assembling the Tree of Life, Oxford 2004, Oxford University Press


  2. ↑ Rothwell, G. W., Scheckler, S. E. & Gillespie, W. H. (1989). «Elkinsia gen. nov., a Late Devonian gymnosperm with cupulate ovules.» Botanical Gazette, 150: 170-189, oppgjeve i «Pteridospermatophyta» på Engelsk Wikipedia.


  • frøplanter (21.10.2011) i Store norske leksikon


  • Classification - Spermatophyta ved plants.usda.gov



Spire Denne biologiartikkelen er ei spire. Du kan hjelpe Nynorsk Wikipedia gjennom å utvide han.







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