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Ochrolechia mexicana Vainio
Mexican Saucer
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: Montane hardwood forest
Whitish thallus; large disks round or crowded, with smooth, puffy lecanorine rims; disks sunken below rims, mostly pruinose, appearing white, yellow or pink; CHEMISTRY: apothecial disk, rim cortex & medulla of rim KC+, C+ red (gyrophoric acid), 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 but not rim medulla; O. africana reacts KC+, C+ red on disk surface & rim medulla, but not rim cortex
None
Hardwood forests, on bark (Betula)
Corticolous crustose lichenized fungus, photobiont a green chlorococcoid alga (Trebouxia?)
None
Southern Blue Ridge
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.
Tripp, E. A. & J. C. Lendemer. 2020. Field guide to the lichens of Great Smoky Mountains National Park. The University of Tennessee Press, Knoxville.
Malcolm Hodges
13 August 2024