About Neoerysiphe galeopsidis (DC.) U.Braun
This fungus species, Neoerysiphe galeopsidis (DC.) U.Braun, forms dense, white fuzzy patches on the leaves of its host plants. The broadly defined Neoerysiphe galeopsidis sensu lato infects plant species from many different genera, and may be taxonomically split into multiple distinct species in the future. On some host plants like lamb's-ear, infections caused by this fungus can be harder to detect.