Rod wrote:
Found these mushrooms at a branch of uk.d-i-y's second favourite German
discount supermarket, Lidl. Can anyone identify them?

http://www.flickr.com/photos/polyurethane/3019321452/

If they are in fact mushrooms, they are bo]g standard agarics. Just very
newly picked.

I think the normal cultivar is agaricus bitorquis, or agaricus bisporus
but I am not sure.

http://en.wikipedia.org/wiki/Agaricus_bisporus