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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: Wet and dry forests and woodlands

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Description

Small foliose lichen with pale gray thallus, lobes adnate to bark surface; lobe tips with white maculae; inner part of most thalli with scattered groups of short to moderate-length, simple to branched isidia; CHEMISTRY: medulla K-, KC+ pink, C-, PD+ red (protocetraric acid); FIELD ID: rarity leads to ID by process of elimination, clues being small size, pale coloration, lack of cilia, scattered isidia & southerly distribution, confirmed with positive KC test

Similar Species

Bulbothrix isidiza looks similar, but it has short cilia with bulbous bases (sometimes different to see in the field) & different medullar chemistry; Punctelia rudecta is often growing on the same trees, has isidia, & the white pseudocyphellae can look like maculae, but its isidia form in groups within pseudocyphellae & it usually appears darker than the present species; multiple isidiate Parmotrema species also occur in the same areas, but they are larger, immaculate, & some have cilia

Related Rare Species

None

Habitat

Wet & dry forests & woodlands; substrates: 3 records on hardwood bark, 1 on a Rosa cane, 1 on Phoradendron (mistletoe), & 1 on Taxodium

Life History

Corticolous foliose lichenized fungus, photobiont a species of green alga (Trebouxia?)

Survey Recommendations

None

Range

Coastal Plain

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

16 May 2022