A common mushroom which can be found in different habitats, easily recognisable from the small pyramidal spines covering the mushroom. I found these in small groups in the middle of Clay hill woods in the New Forest, Hampshire.
A brown cloud of spores are released when this mushroom is trodden under foot, maybe that is why the genus was named "Lycoperdon" which means wolf-fart puffball. Not that I am going to smell it to find out. Only edible from young specimens.