Not a grass Miz Petra, It's an herb--has some medicinal uses also I think. I think that's it that grows wild here a little, though it doesn't look quite like the pictures Google had. Anyway, cats love it though only 50 % of them are affected according to Google-dried, its used to stuff cat toys also.
Donna lnows a lot about herbs, I'll put it on Shout for when she comes back on