Last summer while botanizing a railroad in
Drawing closer I was startled to see uncinate spines on the indurated glumes and/or lemmas. It's difficult to tell what's a glume and what's a lemma on this unusual grass.
It turns out to be a little weed of limited distribution called Stalked Bur Grass, Tragus racemosus. According to literature, it catches in lambs' wool and shows up around woolen mills but does not persist.
Further exploration revealed two more colonies along this same track in neighboring