Awn shield fern

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Awn shield fern
Awn shield fern (Polystichum setiferum)

Awn shield fern ( Polystichum setiferum )

Systematics
Ferns
Class : True ferns (Polypodiopsida)
Order : Spotted ferns (Polypodiales)
Family : Fern family (Dryopteridaceae)
Genre : Shield ferns ( Polystichum )
Type : Awn shield fern
Scientific name
Polystichum setiferum
( Forssk. ) Moore ex Woynar

The Bristlecone shield fern ( Polystichum setiferum (Forssk.) Moore ex Woynar often), even bristly shield fern called, is a plant of the genus of polystichum ( Polystichum ) in the family of dryopteridaceae (Dryopteridaceae).

description

The awn shield fern grows as a perennial herbaceous plant and reaches heights of 30–120 centimeters. Fronds up to almost 1 m long, soft, double to almost triple pinnate, triangular, lanceolate, clearly stalked, slightly narrowed at the base, hence sudden break in the fletching, yellow-green, usually not overwintering. Feathers clearly stalked, long bristly awned; the lowest leaflet of the lower leaflet hardly larger than the following. Spindle 15–30 cm long, densely scaly scaly. Sori quite no, veil delicate. The spore ripening takes place from June to September.

The number of chromosomes is 2n = 82.

Awn shield fern ( Polystichum setiferum )

Occurrence

The awn shield fern occurs in Europe, North Africa, Canary Islands, Asia Minor, and the Caucasus. In Europe in the southern and southwestern part, northwards to England and Ireland, in Germany reaching the northeastern border of the distribution: Sauerland, Odenwald, Main area near Obernburg, Black Forest, neighboring in northern Switzerland (Rheinfelden) and in the Vosges (southern Vosges to northern Vosges near Zabern : Zinseltal).

The awn shield fern grows on shaded, fresh (to moderately moist), partially slightly percolated, mostly alkaline, but low-lime, weakly acidic clay soils , mostly on steep, sometimes also rubble-rich slopes in a damp location, preferably at creek cuttings , mostly in beeches rich in ferns - or less often in beech-fir forests. It thrives in the Galio-Fagetum, in societies of the Carpinion Union or the Fagetalia order.

Taxonomy

Synonym for Polystichum setiferum (Forssk.) Woyn. are Polypodium setiferum Forssk. , Aspidium angulare Willd. , Polystichum angulare (Willd.) C. Presl and Polystichum aculeatum subsp. angulare (Willd.) Vollm.

literature

  • Otto Schmeil, Jost Fitschen: The flora of Germany and the neighboring countries. 95th edition, 2011, ISBN 978-3-494-01498-2 .
  • Henning Haeupler , Thomas Muer: picture atlas of the fern and flowering plants of Germany (= the fern and flowering plants of Germany. Volume 2). 2nd, corrected and enlarged edition. Published by the Federal Agency for Nature Conservation. Ulmer, Stuttgart 2007, ISBN 978-3-8001-4990-2 .
  • Steinbach's nature guide: lichens, mosses, ferns. Mosaik-Verlag, Munich 1991, ISBN 3-570-6652-5 .
  • Oskar Sebald, Siegmund Seybold, Georg Philippi: The fern and flowering plants of Baden-Württemberg. Volume 1: General Part, Special Part (Pteridophyta, Spermatophyta). Ulmer Verlag, Stuttgart 1990, ISBN 3-8001-3309-1 .

Individual evidence

  1. ↑ a b Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas . With the collaboration of Angelika Schwabe and Theo Müller. 8th, heavily revised and expanded edition. Eugen Ulmer, Stuttgart (Hohenheim) 2001, ISBN 3-8001-3131-5 , pp.  86 .

Web links

Commons : Bristly shield fern ( Polystichum setiferum )  - Collection of images, videos and audio files