Leucoagaricus leucothites
This very successful mushroom has been found throughout the world.
Grows from soil, often in urban areas near gardens and landscapes. Lumpy,
bell-shaped cap when young. Stem with a ring, often staining yellow when
handled, hollow and with a bulbous base. Could be mistaken for one of the
deadly all-white
Amanita mushrooms, but Leucoagaricus leucothites lacks a
universal veil and volva.
Detailed description at
MushroomExpert.Com