Species

Rhytisma arbuti

Rhytisma arbuti. Photo: (c) brnhn, some rights reserved (CC BY-NC)

iNaturalist • Wikipedia

Rhytisma is a genus of fungi in the Rhytismataceae family commonly known as ‘tar spot’. There are about 18 species, which live parasitically in the leaves of deciduous trees.

— Wikipedia

Sightings

Where in Humboldt

Discussion

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