One of my employees found this puffball alongside the road by our farm a few days ago.   It is the biggest one I have ever seen!  This prompted me to do some research, and I found out that while most puffballs are not poisonous, some of them often look similar to young agarics, especially the deadly Amanitas, such as the Death Cap mushroom.  It is for this reason that all puffballs gathered in mushroom hunting should be cut in half lengthwise. Young puffballs in the edible stage have undifferentiated white flesh within; whereas the gills of immature Amanita mushrooms can be seen if they are closely examined.

I also found this interesting bit of information: Puffballs were traditionally used in Tibet for making ink by burning them vigorously, grinding them, then putting them in water and adding glue liquid and “a nye shing ma decoction,” which, when pressed for a long time, made a very black dark substance which was used as ink.