I'm a nature guide in Harrison ME and I could use some help figuring these plants out! I've never been this far east before! Please help with as many or as few as you can! Thank you.

1- a Ranunculus species (common name "Buttercup")
2 - Self-heal (Prunella vulgaris)
3&4 - a Potentilla species, likely Potentilla simplex
5 - Red Clover (Trifolium pratense)
6 - a Myosotis species (common name "Forget-me-not")
7 - a Houstonia species, most likely Bluets (Houstonia caerulea)
8 - Bugleweed (Ajuga reptans)
9 - a Sisyrinchium species (common name "Blue-eyed grass")

to ATP!

#1 Maybe the Maine native Ranunculus bulobsus?:
http://uswildflowers.com/detai...
https://gobotany.newenglandwil...

Ranunculus bulbosus isn't native to anywhere in the "new world" but is a European plant that has naturalized widely here.
The fact that the basal leaves aren't showing makes it harder to ID. Although the flower is a little out of focus, I'm seeing upturned sepals on the flower at the top of the photo, which would exclude Ranunculus bulbosus (which has down-turned sepals.) Ranunculus acris seems more likely, which is another European/Eurasian plant that has naturalized here. The flowers of acris and bulbosus do look very similar except for the sepals.

Actually, I think only the Houstonia, Sisyrinchium and possibly the Potentilla are native. Oh, and possibly the Myosotis if it is Myosotis laxa rather than the other introduced species.