White-flowered plant going to seed in my lawn
Hi - This is called hairy bittercress (Cardamine hirsuta). It is an annual weed that thrives in the cool spring weather. Eventually the plants die down when the weather gets warm, but they are notorious for their effective seed dispersal prior then! It tends to show up in bare spots or where lawn is mowed too short.
In addition, the Brooklyn Botanic Garden has a good article that goes into further detail about hairy bittercress, https://www.bbg.org/news/weed_of_the_month_hairy_bittercress
You can also ask them questions. Email AskDep@MontgomeryCountyMD.gov or call 240-777-0311.