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Pertusaria subpertusa Brodo
Common Mesa-Wart
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: None
Element Occurrences (EOs) in Georgia: 0
Habitat Summary for element in Georgia: Forests, woodlands and swamps
Pale gray, continuous thallus, slightly lumpy to smooth; apothecia within short, steep-sided warts, with multiple ostioles on broad, flat summit, ostioles brown; MICROSCOPY: spores ellipsoid, colorless, simple, inner wall ornamented, 2/ascus; CHEMISTRY: medulla K+ brownish, KC-, C-, PD+ red (protocetraric & fumarprotocetraric acids), cortex C-, UV-/+ pale pink-orange; FIELD ID: most reliably from other mesa-warts with a field K test to medulla
Other mesa-warts on bark: Pertusaria macounii has medulla K+ yellow, PD+ orange (stictic acid), & P. neoscotica has medulla K+ red, PD+ yellow to pale orange (norstictic acid)
Pertusaria appalachensis
Forests, woodlands & swamps; substrates: hardwood bark: 42% Acer, 18% Quercus, 8% Carya & 30% other hardwoods or unknowns; 1 record on Juniperus bark
Corticolous crustose lichenized fungus, photobiont a green alga in Trebouxia
None
Statewide
Unknown
Fairly common throughout
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
19 July 2022