Ink painting/drawing of Cristulariella leaf spot on chestnut oak, caused by the fungus Cristulariella depraedans.

Original photo by @UTPlantDoc, who thanked “Tom Kesling in GA for the specimens…”

N.B. this is one of the prettiest infected leaves that I have ever seen!

The painting shows a dark green maple chestnut oak leaf, with the major veins draw in black. The leaf is covered in circular lesions, with concentric rings in light and dark brown. The lesions spread over the major veins and leaf midrib, but the presence of the major veins causes the rings to distort.

Top: scanned painting

Bottom: montage with painting and reference image