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Hypotrachyna laevigata (Sm.) Hale
Loop lichen
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: None
Element Occurrences (EOs) in Georgia: 0
Habitat Summary for element in Georgia: Montane forests
Gray thallus of small, adnate lobes, rounded sinuses forming circular gaps between lobes (“loops”); mostly unbranched, short black rhizines on some lobe margins; underside black; eroding pustules creating fragments that act as diaspores, pustule breakdown exposing a thin white medulla; CHEMISTRY: medulla C+ yellow-orange, KC+ yellow-orange, UV-; FIELD ID: chemical tests required
Other pustulose Hypotrachyna species (see key below)
Hypotrachyna croceopustulata, H. cryptochlora, H. oostingii, H. pseudosinuosa
Montane forests, on hardwood & conifer bark
Corticolous foliose lichenized fungus, photobiont a unicellular green 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.
Lendemer, J. C. & R. C. Harris. 2006. Hypotrachyna showmanii, a misunderstood species from eastern North America. Opuscula Philolichenum 3: 15-20.
Nash III, T. H., B. D. Ryan, C. Gries & F. Gungartz (eds.). 2002. Lichen flora of the greater Sonoran Desert region. Vol. I. Lichens Unlimited, Arizona State University, Tempe.
Malcolm Hodges
25 March 2022
