It sounds like a grass we have, very coarse, if you draw your finger along the underside it's very rough, almost like a fine rasp. Grass blades grow in tight clumps, 'sods' stand up almost like footballs, when I was among it in the bottom field a few years ago the 'flower' stems were taller than me, so some nearly 6ft almost feathery heads, quite scary if you lose your direction. My sheep only nibble at it until winter and hungry.
I did look it up but forgotten the name. I'll go ano check my grass book
Does this sound the same as the one you mean?