Another specimen brought into the Ada County Master Gardener lab - it looks like a rotting bulb. It was found underground, along with a black-topped mushroom-looking thing. The skin on the ball of blob is pinkish, which is a great big clue that this, and the nearby mushroom, are the same thing: a stinkhorn. The stinkhorn mushroom will grow out of this pouch when it's ready, and may grow up to 10 inches tall. It doesn't live very long, thrives in woody material (such as bark chips/wood mulch), isn't harmful, but isn't edible. "Stink" is in the name for a reason. This mushroom thrives on decaying organic matter. Pull and discard the mushrooms if they are bothersome, or if pets or children might be crawling around in them.