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Cystopteris fragilis

From Wikipedia, the free encyclopedia

Cystopteris fragilis
Sori

Secure  (NatureServe)
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Division: Polypodiophyta
Class: Polypodiopsida
Order: Polypodiales
Suborder: Aspleniineae
Family: Cystopteridaceae
Genus: Cystopteris
Species:
C. fragilis
Binomial name
Cystopteris fragilis
Synonyms

Filix fragilis (L.) Underw.

Cystopteris fragilis is a species of perennial fern known by the common names brittle bladder-fern[1] and common fragile fern. It can be found worldwide, generally in shady, moist areas.

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Transcription

Description

It has a short, black rootstock. The leaves are up to 5-25 cm and are borne on fleshy petioles with few or no long hairs. The petioles are about half the length of the leaf blade. Each leaf is divided into many pairs of leaflets, each of which is subdivided into lobed segments. The leaflets are narrowly triangular and apiculate. The underside of the leaf has many rounded sori containing the sporangia. A young Cystopteris fragilis is said to have the scent of bitter almond, which is caused by spores that contain hydrogen cyanide.[2]

Habitat

The plant, native to for example Finland, grows in places fit for its brittle structure: usually shady and slightly moist areas, in the cracks and ledges of vertical rock faces, blockfields and sometimes on even cliff surfaces as well. It avoids the more most acidic and barren cliffs and prefers especially slightly lime rich soil.[2]

Gallery

  • Icicle Creek, WA
    Icicle Creek, WA
  • Adaxial leaf
    Adaxial leaf
  • Abaxial leaf
    Abaxial leaf

References

  1. ^ BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
  2. ^ a b Piirainen, Mikko; Piirainen, Pirkko; Vainio, Hannele (1999). Kotimaan luonnonkasvit [Native wild plants] (in Finnish). Porvoo, Finland: WSOY. p. 36. ISBN 951-0-23001-4.

External links


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This page was last edited on 3 June 2024, at 17:24
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