Russula, pale tan cracking cap, which looks almost spherical when young, as these were. I thought it was a puffball viewing it from the top. Bigger cap 5 cm, still incurved, stem 4 high x 2 wide, white, flesh white, mild, very solid. The cap of one has greenish 'stains'. but I have no idea if this is significant for identification. No spore print, just drops of water, but I do not doubt it is a Russula.