Olpidium brassicae
Olpidium brassicae is a plant pathogen, it is a fungal obligate parasite. In 1983, the Alsike, Alberta area's clover was struck by a fungus epidemic of Olpidium brassicae, previously not seen in Canada. Wikipedia
Higher classification: Olpidium
Scientific name: Olpidium brassicae
Phylum: incertae sedis
Rank: Species