Judi,

I found a website that *might* have an image that would help you. It's
the John C. Tacoma Mushroom Slide Collection, 1968-1978, Indiana
University -- and it seems to have a *lot* of images:

http://www.ulib.iupui.edu/special/mss019.html

Good luck!

Anne Lurie

PS -- Googling for "blue mushroom" brings up images, but they're fish!