Annulohypoxylon thouarsianum

Annulohypoxylon thouarsianum is a species of ascomycete fungus.

Description
The species grows on the bark of decaying hardwood trees. Its fruiting body is sessile, and ranges from 1 to 5 cm wide. The surface of the fruiting body is dark brown or black and has a rough texture due to the high number of perithecia.

Similar species
Various other Annulohypoxylon species are similar, as is Daldinia childiae. Species of Jackrogersella, Rosellinia, and Nemania have fewer bumps.

Distribution
Annulohypoxylon thouarsianum is most commonly found along the United States' West Coast, in the Eastern U.S., and in Mexico.

Taxonomy
The species was moved from the genus Hypoxylon to Annulohypoxylon in 2005. The following varieties are recognized:


 * A. t. macrosporum
 * A. t. thouarsianum