Online Atlas of the Pteridophytes of Luxembourg
Dryopteris pseudodisjuncta (Tavel ex Fraser-Jenkins) Fraser-Jenkins
Elegant Scaly Male-fern
Dryoptéris écailleux élégant
Eleganter Schuppen-Wurmfarn
Elegante Schuppe-Wuermfar
Class: Polypodiopsida
Family: Dryopteridaceae
DD – Data Deficient
Syn.: Dryopteris affinis (Lowe) Fraser-Jenkins subsp. pseudodisjuncta (Tavel ex Fraser-Jenkins) Fraser-Jenkins
Adiantum aleuticum (Rupr.) C.A.Paris
Western Maidenhair Fern
Adiante des Aléoutiennes
Westlicher Frauenhaarfarn
Aleuten-Fraenhoerfar
Class: Polypodiopsida
Family: Pteridaceae
R – extremely rare
Adiantum aleuticum – member of the Adiantum pedatum complex – was observed, on the 21th of June 2022, in a wall at Ettelbruck. To our knowledge, this is the first documented naturalized occurrence in Luxembourg of this garden escaped fern.
Krippel, Y., G. Gallego, S. Hermant & G. Colling, 2023. Another garden escaped fern in Luxembourg – Adiantum aleuticum (Rupr.) C.A.Paris (Pteridaceae). Bulletin de la Société des naturalistes luxembourgeois 125: 113–118.
D. borreri × D. filix-mas
n/a
n/a
Kritesche Wuermfar
Class: Polypodiopsida
Family: Dryopteridaceae
R – extremely rare
Syn: D. ×complexa nothosubsp. critica Fraser-Jenk.
Exact information on the distribution of the hybrids Dryopteris affinis agg. × Dryopteris filix-mas in Luxembourg is lacking. The Herbarium of the National Natural History Museum of Luxembourg contains two Dryopteris specimens collected by L. Reichling in 1952 (LUX 19101, LUX 19109), considered as Dryopteris ×complexa Fraser-Jenkins nothosubsp. critica Fraser-Jenkins ( = Dryopteris affinis subsp. borreri × Dryopteris filix-mas), det. Fraser-Jenkins 27.8.1987.
See also: Krippel, Y., W. Bujnoch & G. Zenner, 2009. – Nachweise diploider und triploider Sippen aus dem Dryopteris affinis-Aggregat und einer Hybride mit Dryopteris filix-mas (Dryopteridaceae, Pteridophyta) im Gebiet der Obersauer (Luxemburg). – Bull. Soc. Nat. luxemb. 110: 43-52.
Cyrtomium fortunei J. Smith
Fortune’s Holly-fern
Cyrtomium de Fortune
Ostasiatischer Sichelfarn
Fortune-Séchelfar
Class: Polypodiopsida
Family: Dryopteridaceae
R – extremely rare
Cyrtomium fortunei var. clivicola – first erroneously identified as Cyrtomium falcatum – was observed, on the 4th of July 2020, by Jo Goergen and Patrick Thommes in a ditch near Esch-sur-Sûre. To our knowledge, this is the first documented naturalized occurrence in Luxembourg of this popular garden fern.
Krippel, Y. & P. Thommes, 2021. Cyrtomium fortunei J. Sm. (Dryopteridaceae) and other garden escaped ferns in Luxembourg. Bull. Soc. Nat. luxemb. 123: 21-28.
![Diphasiastrum complanatum (L.) Holub [extr. herb. Kotz]](https://pteridophytes.lu/wp/wp-content/uploads/Extrait-herb-Koltz-Lycopodium-complanatum-lr-150x150.jpg)
Diphasiastrum complanatum (L.) Holub
Northern Ground-Cedar
Lycopode aplati
Gewöhnlicher Flachbärlapp
Flaacht Hexemoos
Class: Lycopodiopsida
Family: Lycopodiaceae
RE – regionally extinct
Diphasiastrum complanatum sensu lato was observed in four locations; the only certified location for Diphasiastrum complanatum (L.) Holub s. str. is in the north-west of Luxembourg, where the Running-pine was observed in the 19th century by Koltz in a wood between Rambrouch and Arsdorf.
Krippel, Y. & J. A. Massard, 2019. – Les lycopodes (Lycopodiaceae) au Luxembourg – notes chorologiques et liste rouge. – Bull. Soc. Nat. luxemb. 121: 53-69.
Trichomanes speciosum Willd.
Killarney fern
Trichomanès remarquable
Prächtiger Dünnfarn
Aparten Hautfar
Class: Polypodiopsida
Family: Hymenophyllaceae
LRlc – lower risk least concern
Although primarily a species of the UK, Ireland, Brittany and the Atlantic Islands (Canaries, Madeira and the Azores), the filmy ferm Trichomanes speciosum Willd. (Killarney fern) [Photo 1] is also found in Europe at scattered locations in other parts of France, Spain, Portugal and Italy.
The gametophytic generation of Trichomanes speciosum Willd. [Photo 2] (Syn.: Vandenboschia speciosa) can be found independently of the sporophyte and seems to be widespread in Europe – in contrast to the sporophyte. It appears however to exist in a state of arrested development, unable to produce the mature form under present conditions.
Trichomanes speciosum Willd. is listed on Annexes II and IV of the Habitats Directive and Appendix I of the Bern Convention. It is listed as rare on the IUCN global RDL.
In Luxembourg the independent gametophyte of Trichomanes speciosum was first discovered in 1993 [Jermy, Rasbach, Rasbach & Viane (unpubl.)]. In 1994 some new locations were found [Colling, G. & L. Reichling, 1996. – Notes floristiques 1994-1995. – Bull. Soc. Nat. luxemb., 97: 25-38]. So, in late 1999 a project was launched, to investigate the sandstone region, commonly called ‘Petite Suisse’, in Luxembourg in order to fix the distribution area of the gametophyte. Many new locations of the gametophyte were found. Most of the sites occur in the ‘Petite Suisse’ area, but the independent gametophyte of Trichomanes speciosum is largely present in the whole sandstone area as far as the valley of the river Alzette. The discoveries of the gametophyte on Devonian schist showed that the species is quite widespread in the Luxembourg’s Ardennes too.
The results of the different investigations, with a description of the gametophyte, the history of its discovery, the present distribution and status in Luxembourg and the neighbouring regions can be found in following publications:
Syn.: Vandenboschia speciosa (Willd.) G. Kunkel
Thelypteris palustris Schott
March Fern
Fougère des marais
Sumpffarn
Suppefar
Class: Polypodiopsida
Family: Thelypteridaceae
CR – critically endangered
The first discovery of Thelypteris palustris, a species regarded as doubtful for the flora of Luxembourg, was made on the first of November 1953 by F. Jungblut; the population is still thriving today. More than seventy years after this first observation, a second population was discovered by J.-P. Wolff in the north of the country.
Pteridium aquilinum (L.) Kuhn
Bracken
Fougère-aigle
Adlerfarn
Aadlerfar
Class: Polypodiopsida
Family: Dennstaedtiaceae
* – not threatened
Polystichum × bicknellii (Christ) Hahne
Lowland Hybrid Shield-fern
n/a
n/a
Bicknell-Schëldfar
Class: Polypodiopsida
Family: Dryopteridaceae
R – extremely rare
Polystichum setiferum (Forssk.) Woynar
Soft Shield-fern
Polystic à soies
Borstiger Schildfarn
Buuschtege Schëldfar
Class: Polypodiopsida
Family: Dryopteridaceae
R – extremely rare
