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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: Pine sandhill woodlands, mesic forests, swamps

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Description

Pale green-gray thallus of broad (0.5-2 cm wide) lobes, older parts sometimes cracked, with undersides pale brown to narrowly white at lobe edges, black in center; old lobes edged with mounded gray-green soralia, narrow to thick; lobes with short black cilia, often sparse or absent; CHEMISTRY: medulla K-/+ pale yellow, C-, KC+ pink, PD+ red/orange, UV- (protocetraric & echinocarpic acids); FIELD ID: distinctive, confirming with negative field UV test to rule out Parmotrema rampoddense, but eciliate examples can also resemble P. cristiferum

Similar Species

Parmotrema rampoddense is also large & sorediate, but is reliably long-ciliate, & its medulla is PD-, UV+ blue-white; P. cristiferum has K+ red-maroon medulla (see key below)

Related Rare Species

None

Habitat

Pine sandhill woodlands, mesic forests, swamps; substrates: hardwood bark: 32% Quercus & 44% other hardwoods or unknowns; conifer bark: 12% Pinus, 2 records on Juniperus & 1 on Taxodium; 6% on silicious rock

Life History

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

Survey Recommendations

None

Range

Coastal Plain, Piedmont, Ridge & Valley (absent from higher elevations)

Threats

Unknown

Georgia Conservation Status

Fairly common

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