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White fluffy mold-like substance on a plant on Bruce Trail. Interested to know what this may be.
Green lichen on a tree trunk
Powdery mildew, along with the rust Puccinia lagenophorae, on groundsel, Senecio vulgaris.
on rotting log in old forest
growing on a beech stem
The Leotiomycetes are a class of ascomycete fungi. Many of them cause serious plant diseases.
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