Answer: Unfortunately, based on your description I am unable to identify the weed with certainty. It is however possible that it is a cool season weed that will die back of its own when the weather turns hot again next summer. One approach would be to cover it with several layers of damp newspaper topped with several inches of mulch. This would serve to smother the weed as well as help to feed the soil as the organic matter from the weeds and toppings eventually decompose. Alternatively, you might wish to take a sample to your county extension for identification and their recommendations for control. I'm sorry I can't be more specific.
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