Charles Jay Gould

Insolibasidium deformans is a species of fungus belonging to the order Platygloeales. It is currently the only species in the monotypic genus Insolibasidium. The fungus parasitizes leaves of various Lonicera species, causing honeysuckle leaf blight, a commercially significant disease in plant nurseries. The known hosts for Insolibasidium deformans include at least 18 species of Lonicera. The fungus parasitizes host leaves, producing hyphae within the leaf tissues and basidia that protrude through the stomata. Microscopically, the basidia are auricularioid (tubular with lateral septa).