pestalotia

from The Century Dictionary.

• noun A large genus of melan-coniaceous fungi having black acervuli with 3-or more celled spores, the two terminal cells being usually hyaline and the apical one provided with one or more hyaline appendages. Over 170 species have been described, some of which are parasitic, producing diseases of cultivated plants. P. Guepini is very destructive to leaves of the tea-plant.