Parasol Mushroom - Macrolepiota procera

The cap starts off closed up like a button mushroom but then opens up flat to 20 cm or more, pale buff with numerous darker coarse scales, and with a central umbo. The stem is longer than the diameter of the cap, and has a scaly looking zig-zag pattern. There is a large soft ring which can often be moved up and down the stem. Flesh does not turn red when cut. 

Shaggy Parasol - Chlorophyllum rhacodes. 

Grows on the ground in woods and fields.

Late summer and autumn

Fairly common in Britain in southern Britain, but seemingly less well recorded further north.

Occasional in Leicestershire and Rutland.