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Federal Protection: No US federal protection

State Protection: No Georgia state protection

Global Rank: G3G5

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: In all forested habitats

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Description

Pale green to gray-green thallus of relatively flat, adnate branching lobes, 0.4-0.8 mm wide, with sparse white maculae often at lobe angles; discrete patches of fine white pruina often forming on lobe tips; soralia forming along lobe margins; medulla lemon-yellow, undersides black; CHEMISTRY: cortex UV+ yellow (lichexanthone), medulla K- (medulla is thin & wetting causes black lower surface to show through; allow test to dry before judging color); FIELD ID: with experience, unmistakable, given field UV test; note marginal soralia, pruina & smaller, flatter thallus

Similar Species

Pyxine albovirens has mounded soralia on surface & margins of lobes, is not as flat, & has orange, K+ violet medulla; P. caesiopruinosa has dactyls instead of soralia along lobe margins, & also has orange, K+ violet medulla; P. eschweileri also has yellow medulla, but is UV-

Related Rare Species

None

Habitat

In all forested habitats; substrates: hardwood bark: 31% Quercus, 10% Acer, 8% Carya, 5% Prunus & 32% other hardwoods or unknowns; conifer bark: 6% Juniperus & 5 records each on Pinus & Taxodium; 2 records on Juniperus wood & 1 on moss over Acer bark; 3 records on silicious rock & 1 on weathered plaster; 2 records on rubber parts of old farm equipment

Life History

Corticolous foliose lichenized fungus, photobiont a unicellular green alga

Survey Recommendations

None

Range

Statewide

Threats

Unknown

Georgia Conservation Status

Common to abundant

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.

Harris, R. C. 1995. More Florida lichens including the 10-cent tour of the pyrenolichens. Unpublished manuscript, Bronx, N.Y.

Authors of Account

Malcolm Hodges

Date Compiled or Updated

5 August 2022