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: None

Element Occurrences (EOs) in Georgia: 0

Habitat Summary for element in Georgia: Sandstone outcrops and boulders in forests

---

Description

Brownish to gray thallus thin; black perithecia superficial; MICROSCOPY: colorless spores 2-celled, 8/ascus; FIELD ID: requires dissection

Similar Species

Thelidium zwackhii spores are 4-celled; T. decipiens also has 2-celled spores, but its thallus is white-powdery & its perithecia are sunken

Related Rare Species

None

Habitat

Sandstone outcrops & boulders in forests, on silicious rock

Life History

Saxicolous crustose lichenized fungus, photobiont a green alga in Protococcus or Trebouxia

Survey Recommendations

None

Range

Cumberland Plateau, Ridge & Valley

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.

Harris, R. C. & D. Ladd. 2005. Preliminary draft: Ozark lichens. Unpublished manuscript, New York Botanical Garden, Bronx, NY.

Authors of Account

Malcolm Hodges

Date Compiled or Updated

1 August 2022