Thin-leaved nude fern
| Thin-leaved nude fern | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thin-leaved nude fern ( Anogramma leptophylla ) |
||||||||||||
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Anogramma leptophylla | ||||||||||||
| ( L. ) Link |
The thin-leaved nude fern ( Anogramma leptophylla ) is a type of plant from the genus of the nude ferns ( Anogramma ) within the tree fern family (Pteridaceae).
description
The thin-leaved nude fern is an herbaceous plant that has a one to two-year-old sporophyte and a perennial gametophyte . The sporophyte reaches heights of growth of 3 to 25 centimeters.
The leaves are tightly tufted and are only hairy when young, later glabrous. The frond stem is as long or longer than the blade; it is shiny, dark in the lower part, light reddish-brown in the upper part. The leaf blades are very different; on the outer fronds the sections are rounded, kidney-shaped and cut in the shape of a hand; they are sterile. The outer fronds are much shorter than the fertile inner ones. The sections on the middle fronds are ovate, sometimes heart-shaped at the bottom and the blade is simple to double pinnate with narrower sections. In the largest fronds, the blade is triple pinnate and the sections are oblong-lanceolate and blunt. These fronds have up to seven feathers on each side. The lower leaflets are petiolate. The last sections are mostly wedge-shaped, obovate, lobed, incised, notched or sawed.
The sori develop near the nerves and near the edge, an indusium is missing. The spore ripening is in May and June.
The number of chromosomes is 2n = 26, 58 or 112–114.
ecology
The sporophyte of the thin-leaved hairless fern is annual during the winter. However, its prothallium does not die off prematurely, but survives the dry summer time as a retracted nodule. The delicate fronds of the sporophyte do not appear until the next rainy season and wither after the spore ripening in May or June.
Occurrence
The thin-leaved nude fern is widespread in the world, but with a disjoint area . The distribution area extends from southern North America through Central America and the Caribbean islands to the western side of South America and includes South Africa , East Africa , southeastern Australia , New Zealand , a few areas in South Asia, plus the Mediterranean , Western Europe (north to the Channel Islands ), the Azores , Canaries , Madeira and Cape Verde . In Central Europe, the thin-leaved nude fern occurs only in southern Switzerland and northern Italy . The highest location in the Alps is near Branson in Valais at an altitude of around 1060 meters.
The thin-leaved nude fern is a shade plant ; he is sensitive to frost . It thrives in the Mediterranean region on damp and shady rocks and in areas protected from frost, under hedges, in sunken paths. He avoids limestone areas .
Taxonomy
It was first published in 1753 under the name ( Basionym ) Polypodium leptophyllum by Carl von Linné Species Plantarum , 2, page 1092. The new combination to Anogramma leptophylla (L.) Link was published in 1841 by Heinrich Friedrich Link in Filicum Species , page 137. Further synonyms for Anogramma leptophylla (L.) Link are: Gymnogramme leptophylla (L.) Desv. , Grammitis leptophylla (L.) Sw. , Acrostichum leptophyllum (L.) DC.
literature
- Ernst Bergdolt: Gymnograms Desv. In: Gustav Hegi : Illustrierte Flora Mitteleuropas . Volume 1, 2nd edition. Verlag Carl Hanser, Munich 1935, pp. 56-57.
- Josef Dostál: Anogramma. In Gustav Hegi: Illustrated Flora of Central Europe . Volume 1, part 1. 3rd edition, 1984. Paul Parey publishing house, Berlin, Hamburg. Pp. 113-115, ISBN 3-489-50020-2 .
- Thomas Gaskell Tutin : Anogramma Link. In: Thomas Gaskell Tutin et al .: Flora Europaea . Volume 1, 2nd edition, Cambridge University Press, 1993, p. 13, ISBN 0-521-41007-X .
- Jaakko Jalas, Juha Suominen: Atlas florae europaeae. Volume 1, Map 64, p. 58. Helsinki 1972.
Individual evidence
- ↑ Peter Schönfelder , Ingrid Schönfelder: The new cosmos Mediterranean flora. Franckh-Kosmos-Verlag Stuttgart 2008, ISBN 978-3-440-10742-3 , p. 52.
- ↑ Anogramma leptophylla at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ↑ Anogramma leptophylla at Tropicos.org. In: Flora Mesoamericana . Missouri Botanical Garden, St. Louis
- ^ Vascular Plants of the Americas : Anogramma leptophylla at Tropicos.org. In: 83 . Missouri Botanical Garden, St. Louis
- ↑ a b Anogramma leptophylla at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed July 14, 2020.
Web links
- Anogramma leptophylla (L.) Link In: Info Flora , the national data and information center for the Swiss flora . Retrieved October 11, 2015.
- Data sheet with photo.