Blooming right now. The only one I know the name of for sure is the Yellow Trillium. There are scores of these. Any help with the ID of others is much appreciated.

Dave, I think the red one is Silene regia and the last one is a Larkspur, I'm not sure which. I don't know what the other one is. Hope this is a help.

I think the red one is more likely Silene virginica.

Horntoad said:I think the red one is more likely Silene virginica.

I think you're right, Jay. It's got the notched petals like virginica.

I love the wildflowers in your avatar.

For the last I think, Larkspur, too. My best guess Delphinium carolinianum,
http://www.illinoiswildflowers...
but for a good ID usually need to know more about other possible options (flora of given area) and to compare and eliminate based on the features.