Asplenium ruta-muraria L. ssp. ruta-murariaWall-rue, DE: Gewhnliche Mauerraute, Gewhnlicher Mauer-StreifenfarnSlo.: pozidna rutica Dat.: Oct. 19. 2015Lat.: 46.36006 Long.: 13.69906Code: Bot_920/2015_DSC9447Habitat: dry, stony wall thickly overgrown with mosses; in mixed forest, moderately inclined mountain slope, south aspect; calcareous ground and rocks; partly protected from direct rain by tree canopies; average precipitations ~ 3.000 mm/year, average temperature 7-9 deg C, elevation 640 m (2.100 feet), alpine phytogeographical region. Substratum: soil in crevices among rocks of a man-made low wall. Place: Lower Trenta valley, between villages Trenta and Soa, right bank of river Soa, above abandoned farm house Strgulc, East Julian Alps, Posoje, Slovenia EC Comment: Asplenium ruta-muraria is one of the commonest ferns in west Slovenia. One can find it on almost every stony place, particularly on old stony walls. The plant is very variable. I frequently find plants appearing similar to Asplenium ruta-muraria, which first seem to me something special, or something I haven't seen yet. But it always comes out that they are just another unusual form of the common Asplenium ruta-muraria. Look at picture 102 to see how big the differences can be. The picture shows a young plant growing near Bovec on ground in a beech forest. Young sporophytes of this species frequently have unusually large and morphologically untypical leaves almost without sori. The plant is also very widespread. It grows in all European mountains from lowland to alpine elevations and also outside of them, as well as in many regions of whole Eurasia and North America.Ref.:(1) A. Martini et all., Mala Flora Slovenije (Flora of Slovenia - Key) (in Slovenian), Tehnina Zaloba Slovenije (2007), p 97. (2) K. Lauber and G. Wagner, Flora Helvetica, 5. Auflage, Haupt (2012), p 68.(3) D. Aeschimann, K. Lauber, D.M. Moser, J.P. Theurillat, Flora Alpina, Vol. 1., Haupt (2004), p 80.