Asplenium scolopendrium

Asplenium scolopendrium L. (Aspleniaceae). Berdorf (L). © 2001 by Yves Krippel.Asplenium scolopendrium L.
EnglishHart’s tongue
FrançaisScolopendre, langue de cerf
DeutschHirschzungenfarn, Hirschzunge
LëtzebuergeschHirschzongefar
Class: Pteridopsida
Family: Aspleniaceae

Status

LRlc – lower risk least concern

Map of Asplenium scolopendrium

Further information

Krippel, Y., 2021. Asplenium scolopendrium ‘Furcatum’ et autres formes curieuses au Grand-Duché de Luxembourg. Dumortiera 118: 31-34.

 

Map of Asplenium scolopendrium lusus furcatum

Asplenium ruta-muraria

Asplenium ruta-muraria L. (Aspleniaceae). (L). © 2001 by Yves Krippel.Asplenium ruta-muraria L.
EnglishWall-rue
FrançaisRue / doradille des murailles
DeutschMauerraute, Mauer-Streifenfarn
LëtzebuergeschMauer-Sträifefar, Mauerraut
Class: Pteridopsida
Family: Aspleniaceae

Status

* – not threatened

Asplenium ruta-muraria

Asplenium onopteris

Asplenium cf. onopteris L. (Aspleniaceae). leg. Reichling 1948 - hb.Mnhn - LUX17230. © 2004 by Yves Krippel.Asplenium onopteris L.
EnglishAcute-leaved spleenwort
FrançaisDoradille des ânes
DeutschSpitziger Streifenfarn
LëtzebuergeschSpatze Sträifefar
Class: Pteridopsida
Family: Aspleniaceae

Status

RE – regionally extinct

Asplenium cf. onopteris

Description

Asplenium cf. onopteris was discovered near Berdorf by A. Biermann in 1953 (Reichling 1954). There are no other sites known for Luxembourg. A recent revision however showed that it just was an acute-leaved form of Asplenium adiantum-nigrum !

Further information

Reichling, L., 1954. – Herborisations faites dans le Grand-Duché de Luxembourg en 1953. – Bull. Soc. Nat. luxemb. 58: 76-134.

Asplenium fontanum

Asplenium fontanum (L.) Bernh. (Aspleniaceae). Vercors (F). © 2003 by Yves Krippel.Asplenium fontanum (L.) Bernh.
EnglishSmooth rock spleenwort
FrançaisDoradille de Haller
DeutschJura-Streifenfarn
LëtzebuergeschJura-Sträifefar
Class: Pteridopsida
Family: Aspleniaceae

Status

RE – regionally extinct

Asplenium fontanum

Asplenium adiantum-nigrum

Asplenium adiantum-nigrum L. (Aspleniaceae). Kautenbach (L). © 2001 by Yves Krippel.Asplenium adiantum-nigrum L.
EnglishBlack spleenwort
FrançaisDoradille noire
DeutschSchwarzer Streifenfarn
LëtzebuergeschSchwaarze Sträifefar
Class: Pteridopsida
Family: Aspleniaceae

Status

* – not threatened

Asplenium adiantum-nigrum

Asplenium trichomanes subsp. pachyrachis

Asplenium trichomanes L. subsp. pachyrachis (Christ) Lovis & Reichstein (Aspleniaceae). Beaufort (L). © 2001 by Yves Krippel.Asplenium trichomanes L. subsp. pachyrachis (Christ) Lovis & Reichstein
EnglishLobed maidenhair spleenwort
FrançaisCapillaire des murailles à rachis épais
DeutschSeestern-Braunstieliger Streifenfarn
LëtzebuergeschGelappte brongstillege Sträifefar
Class: Pteridopsida
Family: Aspleniaceae

Status

LRlc – lower risk least concern   

Asplenium trichomanes subsp. pachyrachis

Description

Investigation in order to localise Asplenium trichomanes L. subsp. pachyrachis (Christ) Lovis & Reichstein (Lobed Maidenhair Spleenwort) and to fix the distribution area for Luxembourg.

Asplenium trichomanes L. subsp. pachyrachis (Christ) Lovis & Reichstein
(Syn.: Asplenium csikii Kümmerle & Andras.) [Aspleniaceae, Pteridophyta]

Asplenium trichomanes subsp. pachyrachis (Photo: Y. Krippel)

The Maidenhair Spleenwort (Asplenium trichomanes L.) is present throughout Luxembourg and quite frequent in natural rock habitats, as well as on walls of all types. Generally two subspecies of Asplenium trichomanes are distinguished: the rare subsp. trichomanes, growing on silicious rocks, and the common, rather calcicole subsp. quadrivalens. A third subspecies, Asplenium trichomanes subsp. pachyrachis (Lobed Maidenhair Spleenwort) – found in Europe at scattered locations – is known for Luxembourg since the early 1990-ties. Until 2001 only a few sites where known in Luxembourg, almost exclusively in the ‘Petite Suisse’ area.

Asplenium trichomanes subsp. pachyrachis (Photo: Y. Krippel)

The plants of Asplenium trichomanes subsp. pachyrachis [Photo 1] are usually smaller and of paler coloration than those of subsp. quadrivalens. They always form a flat rosette of fronds which spread closely over the rock face, in a ‘starfish’ manner) [Photo 2]. Asplenium trichomanes subsp. pachyrachis (Photo: Y. Krippel)The pinnae, usually subtriangular or even hastate are often overlapping, which gives each frond a congested overall appearance [Photo3]. Generally longer and more distinctly lobed than in the other subspecies, the pinnae are characterised by an often deeply crenately toothed margin with a conspicuous hyaline border.

Asplenium trichomanes nothossp. staufferi (Photo: Y. Krippel)

Asplenium trichomanes subsp. pachyrachis can hybridise with subsp. quadrivalens, forming a vigorous plant with a more upright habit than subsp. pachyrachis and distinctly intermediate between the parents. It is known as Asplenium trichomanes L. nothossp. staufferi Lovis & Reichstein [Photo 4]. This hybrid is easily found in areas where the two parents are present and grows on natural rocks as well as on man-made walls.

A rapid investigation of natural sandstone outcrops, buildings, walls, … showed that Asplenium trichomanes subsp. pachyrachis is rather common in the sandstone area. Here it occurs on natural, often vertical rock surfaces, in crevices on steep rocks, as well as on sandstone walls. At present date [13/10/2020], many sites in over 80 square kilometers are known. Most of the sites occur in the ‘Petite Suisse’ area, but the Lobed Maidenhair Spleenwort is present in the whole sandstone area as far as Luxembourg-City.

The results of the investigations, with a description of the subspecies, the present distribution and status in Luxembourg can be found in:

Krippel, Y., 2003. – Aire de répartition et statut d’Asplenium trichomanes L. subsp. pachyrachis (Christ) Lovis & Reichstein(Aspleniaceae, Pteridophyta) au Luxembourg. – Bull. Soc. Nat. luxemb. 104: 3-12. [PDF 384 KB]

Diphasiastrum tristachyum

Diphasiastrum tristachyum (Pursh) Holub (Lycopodiaceae). Champ de Feu (Vosges - F). © 2009 by Yves Krippel.Diphasiastrum tristachyum (Pursh) Holub
EnglishGround cedar
FrançaisLycopode petit cyprès
DeutschZypressen-Flachbärlapp
LëtzebuergeschZypressen-Hexemoss
Class: Lycopodiopsida
Family: Lycopodiaceae

Status

RE – regionally extinct

Description

Diphasiastrum tristachyum was mentionned by Lawalrée (1951) for ‘Grunenwald’ between Rambrouch and Arsdorf (19th century), but the only documented record is Beaufort.  Recent observations are lacking.

Further information

Lawalrée, A., 1951. – Les ptéridophytes du Grand-Duché de Luxembourg. – Bull. Soc. roy. Bot. Belg. 83: 225-240.

Krippel, Y. & J. A. Massard, 2019. – Les lycopodes (Lycopodiaceae) au Luxembourg – notes chorologiques et liste rouge. – Bull. Soc. Nat. luxemb. 121: 53-69.