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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: Upland forests and woodlands

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Description

Olive-brown thallus with rounded lobes, sometimes adnate to substrate; lobes with subtle puckers or none at all; rounded isidia grouped at thallus center, not associated with lobe structures; FIELD ID possible with experience, but dissection to note cellular (Leptogium) vs. acellular cortex (Collema) may be necessary

Similar Species

Other Collema species, especially C. furfuraceum, which is more adnate to its substrate, has smaller, less globose isidia arranged along ridges, & has more dramatic, well-defined blisters & ridges

Related Rare Species

None

Habitat

Upland forests & woodlands; substrates: hardwood bark: Quercus 43%, Acer 14%, Carya 14%, other hardwoods 14%; 1 record on Juniperus bark, 2 on limestone & 1 on silicious rock

Life History

Corticolous foliose lichenized fungus, photobiont a cyanobacterium in Nostoc

Survey Recommendations

None

Range

Statewide, but absent from the southwest Coastal Plain

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 July 2022