Delicate striped fern

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Delicate striped fern
Asplenium lepidum IMG 5859.jpg

Tender striped fern ( Asplenium lepidum )

Systematics
Ferns
Class : True ferns (Polypodiopsida)
Order : Spotted ferns (Polypodiales)
Family : Striped fern family (Aspleniaceae)
Genre : Striped Ferns ( Asplenium )
Type : Delicate striped fern
Scientific name
Asplenium lepidum
C. Presl

The tender striped fern ( Asplenium lepidum ) is a representative of the striped fern ( Asplenium ) that occurs in Central Europe only in the Alps .

features

The tender striped fern reaches heights of 4 to 10 cm. The fronds are double to triple pinnate and resemble those of the wall diamond . The last sections are over 2 mm wide, wedge-shaped at the base and rounded and notched at the top. The leaf blade is tender, deciduous and mostly covered with glandular hairs. The petiole is equal to or longer than the leaf blade. The stem is green, brown at the base and around 1 mm thick. The sporangia not cover maturity the underside of the leaflets to the top. The spores ripen in July to September.

The chromosome number is 2n = 144. The species is tetraploid .

distribution

The tender striped fern occurs in Central Europe only in the Austrian Alps. It is rare here in Lower Austria and Styria and is potentially endangered. In the rest of Europe including the Mediterranean region, it occurs in Spain, France, Italy, Sicily, Hungary, Slovakia, Bulgaria, Romania and the Balkan Peninsula as far as Crete and also in Western Asia. It grows in the crevices of vertical to overhanging limestone rock walls of the montane height level .

Systematics

One can distinguish the following subspecies:

  • Asplenium lepidum C. Presl subsp. lepidum
  • Asplenium lepidum subsp. haussknechtii (Godet & Reut.) Brownsey (Syn .: Asplenium haussknechtii Godet & Reut. , Asplenium hermanni-christii Fomin ): It occurs in Spain, Romania, Crete and the Middle East.

literature

  • Siegmund Seybold (Ed.): Schmeil-Fitschen interactive (CD-Rom), Quelle & Meyer, Wiebelsheim 2001/2002, ISBN 3-494-01327-6
  • Manfred A. Fischer , Karl Oswald, Wolfgang Adler: Excursion flora for Austria, Liechtenstein and South Tyrol. 3rd, improved edition. State of Upper Austria, Biology Center of the Upper Austrian State Museums, Linz 2008, ISBN 978-3-85474-187-9 .

Individual evidence

  1. ^ Tropicos. [1]
  2. ↑ a b c Christenhusz, M. & Raab-Straube, E. von (2013): Lycopodiophytina. - In: Euro + Med Plantbase - the information resource for Euro-Mediterranean plant diversity. Datasheet Asplenium lepidum In: Euro + Med Plantbase - the information resource for Euro-Mediterranean plant diversity.

Web links

Commons : Delicate striped fern ( Asplenium lepidum )  - Collection of images, videos and audio files