Loading profile. Please wait . . .

---

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:

Element Occurrences (EOs) in Georgia: 0

Habitat Summary for element in Georgia: Tidal swamp forest, small-stream swamp forest

---

Description

Green-gray continuous thallus, lumpy in places, with scattered immersed apothecia marked by jagged white rims and gray pruinose disks; MICROSCOPY: spores colorless, not turning purple with addition of iodine, 11-14-celled, about 24-38 x 6-7 µm; CHEMISTRY: thallus K-; FIELD ID possible with experience & a field K test

Similar Species

Thelotrema dilatatum can be quite similar, though its margins are more dramatic; its thallus is K+ yellow; Phaeographis lobata also has big disks with jagged margins, but the disks and thallus are darker & its spores are brown

Related Rare Species

None

Habitat

Tidal swamp forest, small-stream swamp forest, on hardwood bark

Life History

Corticolous crustose lichenized fungus, photobiont an alga in genus Trentepohlia

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.

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 Unpublished manuscript, Bronx, N.Y.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

21 July 2022