Wild chervil, Anthriscus sylvestris, a non-native plant from Europe seems to be exploding in numbers and range across the state. It can be seen flowering along roadsides, fields and forest edges in late May or early June. I became aware of this plant in the late 1990s when Ed Ketchledge showed me plants that had colonized the road up to Whiteface Mountain. It is getting fairly common in some areas of the Adirondacks now. If you find it outside these areas it would be good to collect a specimen and let the local invasive species coordinator know. Or you can join iMap invasives and map it yourself. They need more data on the species – Steve Young
Here is a video on how to identify it: