Dutch Elm Disease - Ophiostoma

Vascular Wilts

Dutch Elm Disease - Ophiostoma

Synnemata

Synnemata on elm bark as viewed with a hand lens.

Synnemata under microcope

Microscopic view of a synnema.

Perithecia

Perithecium (note bulbous base).

Perithecia under microscope

Perithecia as seen through the microscope.