The Hepatica I usually find (Western NY State) are a pale blue but color can vary. The white you found are quite pretty. Here is a link to the NY Flora Atlas. Search for Hepatica for links to the species here. FataMorgana Here is a link that might be useful: NY Flora Atlas

Possibly Alpine Sunflower, aka Old Man of the Mountain (Hymenoxys grandiflora) or one of its relatives.

Rhynchospora? Maybe a sedge? Here is a link that might be useful: You can search images here

Don't know of a source with the seed and filler mix, but two sources I've used for wildflower seeds are American Meadows (americanmeadows.com) and Everwilde Farms (everwilde.com). AM does sell wildflower mixes by region, so should have several tailored for the Northeast. I'm more familiar with EF as their varieties and quantity options are usually a better match for my urban lot projects. You'll have to pick seeds for your own mix if you want only perennials. Both firms should provide coverage estimates on their mixes to get to a cost for the area you're planning to seed. Edit - Forgot to add that not all AM mixes are 100% native and the EF native mixes probably are, but from an Upper Midwest (USA) perspective. Both do list the varieties used in each mix. Just noticed AM does now have a mix of NE native perennials and have linked it below. Here is a link that might be useful: Northeast native perennial mix (AM) This post was edited by bostedo on Fri, Apr 12, 13 at 8:22