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Crespoa crozalsiana (B. de Lesd. ex Harm.) Lendemer & Hodkinson
Reticulate Shield
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 and woodlands
Thallus varying from yellow-green to gray-green, with adnate lobes up to 5 mm wide; a reticulate pattern of ridges (often cracked at top) borders cupped depressions; rounded, soralia are usually paler than the thallus, & randomly distributed; CHEMISTRY: medulla K+ yellow (stictic acid); FIELD ID possible with experience, focusing on contrast between green thallus & white soralia, & network of ridges and depression on some or most lobes; field K test on medulla may be necessary for ambiguous thalli
Canoparmelia texana is paler overall, often wrinkled but without a network of ridges and depressions, & soralia are often in lines; its medulla is K-, UV+ blue-white
Canoparmelia alabamensis is much smaller, & on rock
Forests & woodlands; substrates: hardwood bark: 36% Quercus, 7% Acer & 34% other hardwoods; 18% on conifer bark (Juniperus, Pinus & Taxodium); 2 records on silicious rock & 1 on moss over bark
Corticolous foliose lichenized fungus, photobiont a green alga (Trebouxia?)
None
Statewide down into upper Coastal Plain, absent from lower Coastal Plain/coast
Unknown
Uncommon
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
26 July 2022