I would naively suppose that in unstable weather that includes nights with temperatures in the low twenties and late season snow, one would expect only the larger, more robust-appearing plants to thrive. These tiny ones however, seem to be doing just fine. (The blossom in the first photo measures just 1/8 inch across, and the second only 3/16 inch, and each sits on a stem less than two inches tall.)
Spring Whitlow-grass, Draba verna
Maiden Blue Eyed Mary, Collinsia parviflora