Cystopteris

Fragile Blasenfarn ( Cystopteris fragilis )

The bladder ferns ( Cystopteris ) are a fern genus from the family of Wimperfarngewächse ( Woodsiaceae ).

Features

The bladder ferns are perennials and have a blackish rhizome. Sterile and fertile fronds are designed the same: they are pinnate, tender and have a fragile rachis. Its length is up to 30 inches, but usually they are shorter. The fronds die off in the winter. At the base of the petiole there are two vascular bundles. The leaf veins end freely.

The sori are round and are available individually from the sheet edge. The veil ( indusium ) is oval and is laterally attached to the sorus. He vaulted over the sorus vesicular, is tender and finally repulsed.

Dissemination

The genus is widespread in temperate areas around the world. The diploid representatives have their focus in North America.

System

There are, depending on the source of approximately 12 to 20 species. The occurring in Central Europe species are:

  • Alpine Blasenfarn ( Cystopteris alpina ( Roth) Desv. ) Coverage: Europe, North Africa, Turkey
  • Runzelsporiger Blasenfarn ( Cystopteris dickieana R. Sim, Syn: C. fragilis subsp dickieana (R. Sim ) Moore. ), Distribution: Europe and Siberia
  • Fragile Blasenfarn ( Cystopteris fragilis (L.) Bernh. ), Distribution: Europe and Asia
  • Mountain Blasenfarn ( Cystopteris montana ( Lam.) Desv. ) Coverage: Europe, Caucasus and Siberia
  • Sudeten Blasenfarn ( Cystopteris sudetica A. Brown & Mild ), distribution: Europe. Front and East Asia

In Europe there is also just the kind:

  • Cystopteris diaphana ( Bory ) Blasdell, whose circulation area covers except Southwest and southern Europe, even the Azores and Africa.

From de non-European species is still occasionally in culture:

  • Leaf buds - Blasenfarn ( Cystopteris bulbifera (L.) Bernh. ), Origin: Canada and USA

The name in Greek means Cystopteris Blasenfarn and refers to the bubble like the Sori overarching veil.

Documents

  • Siegmund Seybold (ed.): Schmeil Fitschen - interactive ( CD -Rom ), Quelle & Meyer, Wiebelsheim 2001/2002, ISBN 3-494-01327-6
  • Cystopteris in: Flora of North America, Volume 2
  • J. A. Crabbe, A. C. Jermy: Cystopteris Bernh .. In: Thomas Gaskell Tutin include: Flora Europaea. Volume 1, 2nd Edition, pages 24-25. Cambridge University Press 1993. ISBN 0-521-41007- X
  • Walter Erhardt et al: The big walleye. Encyclopedia of plant names. Volume 2, Page in 1348. Verlag Eugen Ulmer, Stuttgart, 2008. ISBN 978-3-8001-5406-7
Leptosporangiate fern Johann Jakob Bernhardi Perennial plant Tom Tutin
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