Coprinopsis atramentaria, and Inky Caps in general, encompass the group formerly known as coprinoid fungi, but which in 2002 were divided into 4 different species (The Shaggy Mane, Coprinus comatas, remained as the type species for Coprinus, in the Family Agaricaceae, while the others were dropped into the Psathyrellaceae Family as Coprinellus, Coprinopsis, and Parasola.)
The common feature that had early mycologists convinced they should all be in the same species was that they all fit the description of “inky cap”, delequising quickly into a black liquid as a methodology for distributing spores.
The ones in the picture above were found in the grass behind Bryan Hall, and are known as the common inky cap, Coprinopsis atramentaria, aka Tippler’s Bane. Inky caps contain a chemical named coprine, which inhibits the body’s ability to break down the acetaldehyde which results from drinking alcohol. This can make you feel very puny, do not drink and eat the otherwise edible inky cap family! (Symptoms include facial reddening, nausea, vomiting, malaise, agitation, palpitations and tingling in limbs, and arise five to ten minutes after consumption of alcohol.)