We've just about eradicated grass bur (Cenchrus spinifex) from the Meadow. I found one of the last survivors a few days ago and yanked it up. I also searched the ground for its evil seeds and threw them all in a paper bag. Then later, I BURNED them in our chiminea.
Grass bur and I go WAY back. I distinctly remember sitting on the street curb of our home in Corpus Christi, crying because I had a sticker bur stuck in my foot. I HATE this stuff. Alas, yes, it IS a native. And according to Wildflower.org, a song bird by the name of pyrrhuloxia somehow eats the seeds. But we don't have that bird around here so I feel A-okay pulling this dastardly grass.