Ergot, Starts out looking orange, matures into a black mass resembling mouse poop. I've got it bad enough this year I can find it on fescue, orchard, annual ryegrass, and even a little of the johnson grass headed early enough to pick it up. They tell me it has the same effects on cattle as the endophyte but the 2 aren't related. Jill Schiedt published a short paper on it, see if I can round it up.
http://agebb.missouri.edu/news/swnews/showall.php?story_num=8330