Coprinoid

Coprinopsis is a genus of mushrooms in the family Psathyrellaceae. Coprinopsis was split out of the genus Coprinus based on molecular data.

Coprinopsis has gills that turn black and eventually liquefy, creating an "ink." In fact, "Inky cap" is the common name of Coprinoid mushrooms. Widespread and commonly encountered, it tends to grow in clusters from senescent root systems around stumps. It has a gray to brownish gray cap that features a few tiny scales over the center.