Addendum

What I forgot yesterday... Dame's rocket and phlox. What I didn't notice because I was running... False Solomon's seal.

We went back to closely inspect the red patch, which involved a significant off-trail jaunt. Here's Chris standing by them:

And here's a close-up:

It is, I believe, Indian paintbrush.

We also rescued a turtle today. 

And saw a lot of crayfish remains.