See notes inside: Spots subcrienlar immarginate from above, alutaceous below 5-15 mm acervuli hypophyllous effused, subcuticular discoid, 125-150 micrometers in diameter, sporules spermatioid, 3-6 x 3/4 micrometers. Resembles Cylindrosporium betula Davis with which it is probably connected and of which it is doubtless the microconidial condition.