Rhytisma decolorans
The inducer of this gall is unknown or undescribed.
Family: Rhytismataceae | Genus: Rhytisma
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Location: upper leaf, lower leaf
Form: non-gall, leaf spot
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Our ID Notes may contain important tips necessary for distinguishing this gall from similar galls and/or important information about the taxonomic status of this gall inducer.
COSEWIC Assessment and Status Report on the Maleberry Lyonia ligustrina in Canada
“
Maleberry is host to the leaf tar spot fungus Rhytisma decolorans that is likely the tar spot species occurring frequently on Maleberry leaves at Long Lake ... [R. decolorans] is also known on three related heath shrubs in the United States (Piedmont Staggerbush – Lyonia mariana, Swamp Dog-Laurel – Leucothoe axillaris and Fetterbush – Leucothoe racemosa, none of which occurs in Canada).
”- COSEWIC: (2020) COSEWIC Assessment and Status Report on the Maleberry Lyonia ligustrina in Canada©
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