If the flower is associated with those palmate leaves on the ground it might be a buttercup; but it looks more like it's part of the larger strap-like leaves. And the poster says it looks like a Dandelion. My suggestion would be Krigia biflora, Two flowered Cynthia. WW Here is a link that might be useful: Krigia biflora

What a fun project. And nice pictures, although not all of them show enough of the plant to be sure of an ID; however most of them look right. The only one I see that is definitely wrong is the June 10 one listed as Enchanter's Nightshade - it looks like some species of Veronica. And I think that your June 15th one listed as Blackberry is actually Black Raspberry, Rubus occidentalis. As for your TBD, July 19 is probably Heal-all, Prunella vulgaris; June 22 is some kind of wild onion, Allium spp, and the June 14 yellow composite might be Krigia biflora, although you really need to see the whole plant to be sure. And I strongly second ESH's suggestion that you include the scientific name with the common name; there are just too many common names to be sure which plant you're talking about. (If you can't be sure of the species just put spp - as in, Allium spp, meaning 'some species of Allium'. Having said that, although the Peterson guide you mention is my favorite wildflower ID book (because it's complete, well organized, and the pictures really look like the plants) it was published in 1968 and hasn't been updated and a lot of the scientific names have been changed. I always check with a more recent source for the Latin name. WW

Thank you both. Last year I recovered a plant from the path of a bulldozer and posted a pic of the leaves and roots. After some debate it was agreed that it was mertensia. If I recall the debate was about the smoothness of the leaf. My recovered specimen had no leaves so I could not get another pic. I put my plant specimen in a pot with a Mertensia? tag. It just emerged with hairy leaves so I assuming its not a mertensia ? I will try to follow up on the above plant.

Yeah I remember seeing Krigia on Wild Ridge Plants website. I took a look on BONAP and looked into each species at some point. Something about the way the flowers look and I knew it was probably a Krigia. Then I saw on the Minnesota wildflower site, the 1 or 2 clasping leaves at the base of the flower stem defines it, good thing you had that picture.