Hi, I took these photos on 21 July, in Hungary, near the Slovakian border (at Salgóbánya). Unfortunately, I didn't take closeups, but now I'm desperate to find out what the "fluffy grass" is called. Thanks :)
Perhaps this one: TERRA Alapítvány - Equisetum sylvaticum L. - Erdei zsurló They can be difficult to tell apart.
Equisetum telmateia (because of the white stem, and E. sylvaticum is usually a smaller plant) Képgaléria - Sphenopsida - zsurlók osztálya / Equisetaceae - zsurlófélék családja / Equisetum L. - zsurló