What are stickers?

I just had a discussion with my fellow IT workers, and I just dropped a southernism they don't recognize. I stopped to think about it for a second or two, and realized that I don't know the 'real' name for what I'm describing.

Growing up in Arkansas, we were careful about where in the yard we went barefoot, because there was a certain type of grass we called 'stickers.' It was grass, but it has small but definite thornlike parts, and they stuck in your skin (thus the name) and made it very uncomfortable to walk barefoot on grass.