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Federal Protection: No US federal protection

State Protection: No Georgia state protection

Global Rank: GNR

State Rank: SNR

Element Locations Tracked in Biotics: No

SWAP 2015 Species of Greatest Conservation Need (SGCN): No

SWAP 2025 Species of Greatest Conservation Need (SGCN): No

2025 SGCN Priority Tier: None

Element Occurrences (EOs) in Georgia: 0

Habitat Summary for element in Georgia: Mixed woodlands, mesic hardwood forests, swamps

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Description

Brownish, obscure thallus with many small, sometimes crowded disks; disks black to dark brown with strongly contrasting white rims, at same level as disk; MICROSCOPY: spores colorless, mostly 6-celled, 8/ascus; FIELD ID: with a little experience, unmistakable, but see Similar Species

Similar Species

Byssoloma species have a green thallus & fuzzy rims, & prefer smooth bark

Related Rare Species

None

Habitat

Mixed woodlands, mesic hardwood forests, swamps, mostly along crevices in rough hardwood bark, especially Quercus but also Carya & Liquidambar; 3 records on smooth Acer bark

Life History

Corticolous crustose lichenized fungus, photobiont a species of Trentepohlia

Survey Recommendations

None

Range

Coastal Plain

Threats

Unknown

Georgia Conservation Status

Rare to occasional

Conservation Management Recommendations

None

References

Esslinger, T. L. 2021. A cumulative checklist for the lichen-forming, lichenicolous and allied fungi of the continental United States and Canada. Version 24. Opuscula Philolichenum 20: 100-394.

Harris, R. C. & D. Ladd. 2005. Preliminary draft: Ozark lichens. Unpublished manuscript, New York Botanical Garden, Bronx, NY.

Authors of Account

Malcolm Hodges

Date Compiled or Updated

30 July 2022