Wild Plantain

Plantago major. Pretty common in lawns. Grows close to the ground, often pretty sprawly and very short, so it takes up a lot of space and occludes the grass below it from thriving.  I imagine that the bottom, taken between two house's lawns, shows the results of one lawn being fertilized, as the plantains are so suddenly so much larger.  It is Eurasian, has some history in folk medicine and is said to be edible, but look into that and be careful.  Fairly easy to pull with a weeding tool.