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Dirinaria picta (Sw.) Clem. & Schear
Powdery Medallion
Federal Protection: No US federal protection
State Protection: No Georgia state protection
Global Rank: G3G5
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: Forests, woodlands, swamps and anthropogenic landscapes
Crowded pale-green lobes tightly adhering to substrate, dividing to fill all space as lichen grows out; older parts of thallus with mounded, discrete soralia; no rhizines on black underside; FIELD ID: unmistakable with careful observation, distinguishing soralia from pustules of D. aegialita, with substrate usually definitive
Dirinaria applanata is virtually identical, told by subtle or qualitative characters, but appears to be a more southerly lichen, as yet unrecorded in Ga.; D. frostii is mostly north of Fall Line, always on massive silicious rock
None
Forests, woodlands, swamps & anthropogenic landscapes; substrates: 87% hardwood bark, especially Quercus & Acer; 10% conifer bark; 1 record on limestone, 1 on silicious gravel
Corticolous lichenized fungus, photobiont a green alga (Trebouxia?)
None
Coastal Plain
Unknown
Fairly common
None
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.
Malcolm Hodges
27 July 2022