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Tar spot

Rhytisma acerinum

Photo by shebebusynow
Published on Project Noah
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46.7162, -122.954

Field Notes

Description:

firm, black, bumpy discoloration on a Big Leaf Maple leaf

Habitat:

Big Leaf Maple in the valley west of the Cascades in central Washington

Notes:

Not every fallen maple leaf showed signs of this. I'm assuming it's a fungus. Maybe it's a slime mold?

Species ID Suggestions

Tar spot

Rhytisma acerinum

Reference Link
Stian Waaler
1

Comments (1)
shebebusynow
Thanks for the ID! It was pretty obscure. After reading the article, I'm glad I didn't pick the leaf up and bring it home.

Spotted for Missions

Mission
Mushroom Mapping
Photographed
PublishedDecember 17, 2011

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