Dead man's fingers
Fungi
Xylaria polymorpha, commonly known as dead man's fingers, is a cosmopolitan saprobic fungus. It is characterized by its elongated upright, clavate, or strap-like stromata poking up through the ground, much like fingers. Wikipedia
Scientific name: Xylaria polymorpha
Class: Sordariomycetes
Genus: Xylaria
Kingdom: Fungi
Order: Xylariales
Family: Xylariaceae
Division: Ascomycota