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Arthonia cinnabarina (DC.) Wallr.
Bloody Comma
Federal Protection: No US federal protection
State Protection: No Georgia state protection
Global Rank: G2G4
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: Mesic hardwood forests
Whitish thallus with irregular or branched lirellae tinted dull-reddish or maroon, obscured by dusty covering of cracked thallus/bark; MICROSCOPY: spores colorless, 4(-6)-celled, 1 end cell enlarged; magenta crystals at edges of ascomata [NOTE: likely more than 1 species involved, given disagreement over spore septation]; FIELD ID: reddish lirellae rounded to elongate, dusted with crumbled whitish material giving them a dull pinkish hue, often crowded, on a whitish thallus; dissection needed to confirm ID
Coniarthonia pyrrhula has bright pink lirellae; Arthonia albovirescens can also appear similar; both lack magenta crystals
None
Mesic hardwood forests; substrates: 33% on Quercus bark, 62% other hardwoods, 1 record on Juniperus bark
Corticolous crustose lichenized fungus, photobiont an alga in Trentepohlia
None
Mostly Coastal Plain, also Piedmont; 1 record from the Ridge & Valley
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.
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
27 September 2023