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Federal Protection: No US federal protection

State Protection: No Georgia state protection

Global Rank: G5

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: Rock outcrops

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Description

Brown thallus composed of a single sheet radiating from the single umbilicus, & reaching 15-20 cm in diameter; upper surface with pits or depressions, often with black apothecia filling pits; underside brown to black, with short black hairs & plates parallel to thallus surface; FIELD ID: unmistakable with a little experience (but see Similar Species)

Similar Species

Lasallia species have bulbous, convex warts on upper surface & undersides without dark hairs; Umbilicaria mammulata has a smooth thallus, lacking pits, depressions or apothecia

Related Rare Species

None

Habitat

Rock outcrops, on silicious rock

Life History

Saxicolous foliose lichenized fungus, photobiont an alga in Trebouxia

Survey Recommendations

None

Range

Southern Blue Ridge

Threats

Unknown

Georgia Conservation Status

Rare

Conservation Management Recommendations

None

References

Brodo, I. M. 2001. Lichens of North America. Yale University Press, New Haven, Conn.

Brodo, I. M. 2016. Keys to lichens of North America: revised and expanded. Yale University Press, New Haven, Conn.

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.

Authors of Account

Malcolm Hodges

Date Compiled or Updated

2 August 2022