Northeast Gardening: Can anyone ID this wildflower?, 1 by bebop2

bebop2 wrote:
Charlotte, it is very low to the ground, maybe 6 - 8 inches at the tallest. It's hard to tell if they are connected but there is rarely just one. Here are 2 more photos I took but I'm not sure they are any more definitive. I thought coreopsis at first but any pictures of coreopsis I compared to these were different. The flowers are really small, maybe 1/2 inch across.

Thanks for the welcome grammyphoeb!