Leaves with dark brown spots with lighter-colored center tissue and yellow border.

Close-up of a single spot with a ring of raised, spore-producing bodies ("acervuli") in the center.

Portion of a single spot under dark-field observation.

Another sample of infected leaves with smaller spots.

Close-up of several spots each with raised, spore-producing bodies ("acervuli") oozing spores.

Close-up of two spots, one showing a ring of raised, spore-producing bodies ("acervuli") with a semi-circular ring of spore-producing bodies ("acervuli") in the center.

Spores of a species of the fungus Phloeospora.