Xylaria

Xylaria is a genus of ascomycetous fungi commonly found growing on dead wood.

Two of the common species of the genus are Xylaria hypoxylon and Xylaria polymorpha 

X. hypoxylon, also known under the common names "Stag's Horn" or "Candle-snuff Fungus", is the most conspicuous because of its erect 3-7 cm tall, antler-like ascocarps (fruitbodies) which are black at the base (where the perithecia are embedded) but white and branched towards the top, where the fruitbodies produce white conidia (asexual spores).

X. polymorpha, "Dead Man's Fingers", is black and often grows in finger-like clusters from the base of a tree or from wood just below ground level.

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Xylaria