Host: Beebalm (Monarda fistulosa)
ID based on host association. The species of the G. biocellatus complex most likely to occur on Monarda.
iNaturalist observation
Reference
Liu, M. & Braun, U.. 2022. Powdery mildews on crops and ornamentals in Canada: a summary of the phylogeny and taxonomy from 2000 – 2019, Canadian Journal of Plant
Pathology, 44:2, 191-218, DOI: 10.1080/07060661.2021.1986744