Looks like Coreopsis tinctoria, annual tickseed or plains coreopsis, which is a widespread native annual. I'm not sure but it probably is native to Vermont. Like most annuals it pops up in disturbed sites or in areas that have naturally sparse vegetation (such as very poor soils). This species is a common component in generic wildflower seed mixes because it puts on a nice show in the first year.

Here is a link that might be useful: Coreopsis tinctoria

Thank you!

Native, annual coreopsis! I have some of this, too. It's really pretty.

Yes, C. tinctoria. I planted some from wild seed last year and it reseeded itself all over the garden this year. They are so pretty and delicate looking---and the plant itself can be ripped & torn and it still grows back strong. (I know because before I knew what the seedlings were, I was trying to tear some out and they kept growing back! They've also been nibbled on by rabbits and have come right back.)

Now I'm curious about this flower. I noticed it keeps flowering and I just can't seem to find any seeds to save. Anyone know what it's called? It just showed up in a different bed so I know it's not from the Vermont's wildflower seeds package.

Coreopsis tinctoria is not native this far east so I doubt it would be native to Vermont. There are many western wildflowers that have spread this way in "wildflower" mixtures. Gaillardia is another one.