Sorry for my English - I mean creeping rhizomes

Here is a link that might be useful: {{gwi:612906}}

I can't find that fern in my books, but it appears to be some kind of Pyrrosia. Pyrrosia lingua has a few crested forms that are similar, but I have never seen a pinnate Pyrrosia lingua. I have a crested form of P. lingua that looks a lot like yours, but each leaf comes from the rhizome, and it doesn't have leaflets (called "pinnules") on the sides of the main stems (called "stipes") like yours does. I would guess that it's another species. Very nice, I want one!

I just checked my book and I see that I got the frond part names wrong. I should correct that to say that the part of the stem between the rhizome and the leaves is the "stipe", but the part of the main stem where the leaves attach is called the "rachis". The leaf part that attaches to the rachis is called a "pinna", and a "pinnule" is a part of the leaf that branches off of the pinna's stem. My apologies...

Thefreddo,
thank you for telling me the fronds`s part in English. It`s really usefull to know them. In Bulgarian there are no different words for this stuff (there is even only one word for leave and frond). I`m still looking for the name of my strange fern.

It reminds me of a staghorn fern. Try a google search on that and see if that is what you have.