The western giant puffball (Calvatia booniana) is a puffball mushroom that can grow 10 to 70 centimetres (3.9 to 28 in) in diameter, as large as its close relative, the giant puffball of eastern ...
They range from golf ball size to as large as a watermelon. A big specimen of the giant puffball (Calvatia gigantea) can be almost two feet long and contain 7,000,000,000,000 (7 trillion) spores. For ...
"We know the basic forms of mushrooms, and we know a lot about calvatia gigantea, giant puff balls," one student said.