Just picked it. The cap is flat 4.25 inches across, was white now going
brown. The gills are brown and the stem has a frill near the cap (although
unfortunately I broke the stem when I picked it. It was an inch and 3/4 high
stem)
I can peel the cap.

Open to your ideas. I only get one of these every year. I ate one because
it looked like a good 'un.
I sure wished I hadn't.

Tina