Can you please ID this weed which is blooming today in my Bethesda yard. It is very low growing and has a small white flower. Please ignore the clover which is also included in one of the photos. One of the photos makes it look like there are 4 leaves together, but in fact there are 2 opposite leaves on the weed, which are shown on one of the photos. Thanks for your help
This is chickweed.
Here is our page with photos of common weeds in Maryland lawns, which may prove useful: https://extension.umd.edu/hgic/lawns/lawn-weed-identification