These small plants I found growing on the wall of our local 14th century castle. The plants do not receive direct sunlight.
Hi Andrey, I was hoping you would have a look at these threads. Thanks for the name of the plants competitor Marchantia. I will have to look it up. A liverwort or a moss?
Not Asplenium ruta-muraria, which has somewhat different frond shape. Probably some other Asplenium species (of which there are hundreds!); the plants are juvenile so it may not be easy to get them fully identified. There is also some Adiantum (probably Adiantum capillus-veneris) in pics 1 & 2. Pic of Asplenium ruta-muraria below (from wikipedia, by Bernd Heynold, CC-BY-SA license)
Hi Michael F. The Botanical Gardens of the Università di Cammerino in Central Italy, identied this plant as being one of 2 species of Asplenium: i) sp. lepidum and sp. ruta-muricaria. The species lepidum has glandular hairs on the leaves, whereas, sp. ruta-muricaria has smooth leaves. The ID was left to me as they could not tell from the photographs whether the leaves had the glandular hairs or not! Checking with a 30x lens, I found the leaves lacking the aforesaid hairs. From the photograph you sent me I can definitely see a difference but looking at the adjoining plant Asplenium cappelis-veneris and the size of it's leaves, one can tell that the plant in the photographs is indeed tiny. At the end of the day, or perhaps I should say 'at the end of the year', I will send these photographs with a report together with many other photographs of doubtful ID plants, to the Royal Botanical Garden, Kew, England. They always very kindly help me with doubtful plants.
Adiantum capillus-veneris should have very thin round rachis, not flatten like in this plant. Among 11 Asplenium species listed for this area (http://luirig.altervista.org/flora/taxa/floraspecie.php?genere=Asplenium), A. lepidum and A. ruta-muricaria are indeed the best candidates.
Just checking - is Asplenium "ruta-muricaria" a different species to A. ruta-muraria? Or just a typo? Google certainly suggests the latter, but I want to be certain. Checked your link Andrey, and the fan-shaped pinnules of A. lepidum fit the mystery plant much better than the club-shaped pinnules of A. ruta-muraria.