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Tar spot

Rhytisma acerinum

Photo by Brian38
Published on Project Noah
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47.2103, -121.055

Field Notes

Description:

Rhytisma acerinum is a plant pathogen that commonly affects sycamores and maples in late summer and autumn.. acerinum is an Ascomycete fungus that locally infects the leaves of trees and is a biotrophic parasite.

Habitat:

Spotted on big leaf maple leaves in a mixed forest.

Reference Links:

Rhytisma acerinum - Wikipedia

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Fungus in America

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PublishedJanuary 13, 2018

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