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Psora pseudorussellii Timdal
Bordered Scale
Federal Protection: No US federal protection
State Protection: No Georgia state protection
Global Rank: G4G5
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: Flat-rock outcrops
Squamules brown (green when wet), flat to convex, 2-4 mm in diameter, with white-pruinose margins; apothecia brown, on surface of some squamules; FIELD ID possible, taking care to eliminate 2 congeners
Psora decipiens squamules are orange-brown with white pruinose margins, & black apothecia are at edges of squamules; Psora icterina has green squamules with yellow edges, & its brown or black apothecia are also on the surface of squamules, not on edges
None
Rock outcrops, on limestone
Saxicolous squamulose lichenized fungus, photobiont a green alga (Myrmecia)
None
Cumberland Plateau, Ridge & Valley
Unknown
Rare
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
5 August 2022