[1] It is recognized for its diverse ecological roles, ranging from saprobic activities on dead organic matter to pathogenic interactions with various hosts, including plants and occasionally humans.

The species name olivacea comes from Latin, meaning olive-colored, which describes the typical appearance of the fungus.

This genus is characterized by pycnidia that are either immersed or erumpent, subglobose in shape, and occur either singly or in clusters.

The conidiogenous cells within are phialidic, hyaline, and shaped like ampullae, dolia, or slightly cylindrical structures.

On land, it predominantly affects woody plants, causing diseases such as dieback and cankers, notably in agricultural settings.

[12] In terrestrial environments, M. olivacea poses a significant threat to agricultural productivity by infecting crops and causing woody plant diseases, leading to economic impacts.