If you have dogs that are close to the ground, or are avid sniffers / bush hunters like mine ...
... Then this plant is your worst nightmare.
As the thing dies, it drops the meanest little bombs of stickers all around the plant, sometimes up to 4 to 5 feet away.
Once your dog gets in that area, it's crying time for both of you.
Sometimes they stick in as a whole burr, but some of them break off, only leaving a trace of the splinter sticking out, and possibly in the webbing of their feet.
TWEEZER TIME. Not only did paws come out bleeding, but I pulled on out of my dogs lip that was buried almost a quarter of an inch, more was in than sticking out, right through to the gum, which made it tough to pull out.
Once they hit the ground and dry, they are very tough to spot, and on top of that, sometimes they die inside the branches of another bush that is still alive, making them even harder to spot.
Oh and check your shoes, cause they will lodge all over the bottom of your shoe, requiring tweezers to remove if you don't want to track them in.