physalospora

from The Century Dictionary.

• noun A large genus of pyrenomycetous fungi having the perithecia seated beneath the epidermis of the host. The spores are unicellular, and hyaline or slightly colored. About 130 species have been described. P. gregaria is said to be the cause of a disease of trees called black mauls. P. Festucæ is frequently found on the leaves of various grasses, especially Festuca.