In article ,
Spider wrote:
Neither my books nor a Web search helps. We have a Peziza (almost
certainly) growing in our drive, probably on conifers, with a
shining white interior and a buff exterior. Also, it cracks open,
irregularly, and is 1.5"-2.5" across.

Any ideas? I doubt that a photograph would help, not least as it
is very hard to get a good one.

Found this on Google Image. It's not the only species, but it's the one
I clicked on. Any help?

http://www.mushroomexpert.com/peziza_domiciliana.html

No, I am afraid not. Thanks, anyway. It's far more this shape:

http://en.wikipedia.org/wiki/File:Pe..._Lindsey_1.jpg

But it cracks open almost like a Geastrum, and it is the the
inside (upper) surface that is white, the other way round from
Peziza domiciliana.


Regards,
Nick Maclaren.