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Ochrolechia africana Vainio
Frosty Saucer
Federal Protection: No US federal protection
State Protection: No Georgia state protection
Global Rank: G5
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: Forests, woodlands
Whitish thallus textured with lumps & low ridges; large disks round or crowded, with smooth, puffy lecanorine rims; disks sunken below rims, mostly pruinose, appearing white, yellow or pink; CHEMISTRY: apothecial disk & medulla of rim KC+, C+ red (gyrophoric acid), but cortex of rim KC-, C-, thallus UV+ yellow (lichexanthone) or UV- (2 chemical races); FIELD ID: chemical tests on minute portions of thallus require dissecting scope & microtubules
Ochrolechia pseudopallescens reacts KC+, C+ red only on the disk surface; O. trochophora reacts KC+, C+ red on rim cortex; O. mexicana is KC+, C+ red on disk surface, rim cortex & rim medulla
None
Forests, woodlands (& other habitats with trees); substrates: hardwood bark, especially on twigs & small branches: 31% Quercus, 6% Prunus & 55% other hardwoods or unknowns; conifer bark: 10 records from Taxodium bark, 3 from Juniperus & 2 from Pinus; 2 records on silicious rock
Corticolous crustose lichenized fungus, photobiont a green chlorococcoid alga (Trebouxia?)
None
Statewide
Unknown
Common to abundant (less frequent in mountains)
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
10 May 2022