In one locality near Iowa City Armillaria mellia was attacked by a parasitic fungus which caused extensive hypertrophy of the upper region of the pileus of its host without rendering the gills sterile. The parasite developed a hymenium which spread over a series of thin, sharp-edged and highly convoluted ridges or gills. The microscopic characters show the fungus to be closely related to that which has been designated Exobasidium mycetophilum (Peck) Burt.
Proceedings of the Iowa Academy of Science
©1915 Iowa Academy of Science, Inc.
Wilson, Guy West
"An Exobasidium on Armillaria,"
Proceedings of the Iowa Academy of Science, 22(1), 134-134.
Available at: https://scholarworks.uni.edu/pias/vol22/iss1/19