There are hundreds of these seedlings popping up all over my backyard and I can't seem to make even a small dent in getting rid of them! I initially tried pulling them out but no matter how many I remove, a whole army of new ones pops up the very next day. It's relatively easy to pull them out with the root intact but in doing so I discovered that the soil around them is full of a seemingly endless supply of what look like tiny, curled up baby seedlings. Does anyone have a clue as to what this invader might be and how to tackle it?!