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Federal Protection: No US federal protection

State Protection: No Georgia state protection

Global Rank: G4G5

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: Open woodlands, forests, swamps

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Description

Pale green-gray thallus of broad (0.5-1 cm wide) lobes that arch away from substrate, giving the thallus a fruticose appearance; undersides white for all but the black center; lobe margins dotted with small white soralia amidst abundant, long black cilia; lobes on many individuals deeply divided by sinuses of non-sorediate & non-ciliate margins, creating narrow, strap-shaped side-lobes tipped with soralia & cilia, giving an overall lacy appearance; depth of sinuses & laciness more subtle in some, requiring careful study; CHEMISTRY: medulla K+ yellow to slightly orangish, PD+ orange (stictic acid); FIELD ID: lacy individuals identifiable on sight (see image above), others require a field K test to confirm

Similar Species

Parmotrema hypotropum is almost identical, differing only by degree of division of main lobes into multiple side lobes, but is usually composed of broad, relatively entire (or only shallowly divided) lobes with fluted edges, & its medulla is K+ red; occasional individuals have intermediate morphology & K tests that are difficult to judge on the red-orange scale (see key below)

Related Rare Species

None

Habitat

Open woodlands, forests, swamps; substrates: hardwood bark: 44% Quercus & 16% other hardwoods or unknowns; conifer bark: 21% Taxodium, 12% Pinus & 7% Juniperus

Life History

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

Survey Recommendations

None

Range

Coastal Plain, Piedmont (probably also Ridge & Valley)

Threats

Unknown

Georgia Conservation Status

Uncommon

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

25 May 2022