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Haematomma persoonii (Fee) A. Massal.
Persoon's Bloodspot
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: Mesic hardwood forests
Pale green or whitish thallus with orange disks; disks even with smooth rims, crowded, merging on contact; never sorediate; MICROSCOPY: sinuous, colorless spores consistently 6-7-celled in maturity; CHEMISTRY: disk K+ deep burgundy-red (russulone); FIELD ID possible with experience; note differences with H. rufidulum (see Similar Species), & take caution that species with haematommone can appear to have orange disks when wet
Other Haematomma species with russulone include H. rufidulum, which is rarely white-sorediate, has mature spores with more cells, & has more prominent rims sometimes raised above the level of disks & often beaded or verruculose (see key below)
None
Mesic hardwood forests, mostly on Quercus bark, with single records on Pinus, Prunus & Ulmus
Corticolous crustose lichenized fungus, photobiont a green unicellular alga (Trebouxia?)
None
Coastal Plain
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.
Brodo, I. M., W. L. Culberson & C. F. Culberson. 2008. Haematomma (Lecanoracaea) in North and Central America, including West Indies. Bryologist 111: 363-423.
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 March 2022
