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Jensenia

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Kingdom
  
Plantae

Class
  
Jungermanniopsida

Family
  
Pallaviciniaceae

Division
  
Marchantiophyta

Order
  
Metzgeriales

Rank
  
Genus

Similar
  
Pallavicinia, Noteroclada, Phyllothallia, Metzgeriidae, Pleurozia

My niece jensenia and my nephews mikey and poopie on poopie bday


Jensenia is a bryophyte plant genus in the liverwort family Pallaviciniaceae. It has been treated as a subgenus of Pallavicinia by several authors, though a set of features seems to set it apart as a genus. The six or seven species of the genus belong to a southern, possibly Gondwana element.

Contents

General characteristics

Jensenia liverworts are dioicous. Compared to Pallavicinia liverworts, their thallus grows erect, and branches tree-like, rather than trailing the ground. The thallus is perched on an ascending stipe which grows from a creeping rhizome. Slime papillae are absent from the thallus margin, though locally present elsewhere. The midrib of the thallus is broad but ill-defined.

Reproductive morphology

Male reproductive organs are scattered over the thallus's dorsal surface, while female organs are specifically placed near a bifurcation of the frond. The pseudoperianth, a tube of thallus tissue protecting the archegonia, is basally fused with the calyptra. Following fertilization, the sporophyte is enveloped by three structures: the cup-shaped involucre, cylindrical pseudoperianth and the calyptra. The spore surfaces are irregularly fasciated.

References

Jensenia Wikipedia