Hello
I bought some plants from this new LFS we found and we washed them and placed them in the tank. But I don't know what they are

what do you think are they? There are some pics below - Thanks!
Oh and I bought some Java Fern and I have a little trouble tying them to the rocks. I tied them with the rubber band sideways on the round rocks, but I'm not quite sure..... There is a pick below and I moved the Java Fern roots a little up so it won't get buried. How can I tie it properly?
Thanks in advance