A tuliptree on a quiet residential side road flowering, brought on by the spell of hot weather in May. I don’t remember the tree having ever flowered previously.
These columbines (aquilegia) are more likely to be cultivars which are now self-seeding in this currently uncultivated garden, but they are clearly holding their own.
Not so much a wildflower as a cultivar gone feral, these spurges are nevertheless holding their own, spreading in competition with the interlopers in this front garden.
Another wildflower unwelcome to lawn perfectionists are any of the common buttercup species. This one was a meadow buttercup, as shown by its deeply indented leaves.