Porcelain fungus

Description:

O. mucida is a white, slimy wood-rot fungus and is strongly tied to rotting beech, where it grows in clusters. It is in season late summer to late autumn, and tiny fungi can then sometimes be seen parachuting from high branches, when they are dislodged by the wind on breezy days.

Notes:

Porcelain fungus is generally not considered toxic. Some sources claims that it is mildly toxic though, while others considers it edible after washing.