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Calicium salicinum Pers.
Stubble 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: Sandhill woodland, upland hardwood forest, bottomland forest
Indistinct thallus with brown-pruinose stipitate apothecia; disks disintegrating into a powdery black mazaedium; MICROSCOPY: spores brown, 2-celled, about 7-11 x 3.5-5 µm; FIELD ID: the confusing array of stubble lichens & unlichenized fungi require dissection to sort out
Other Calicium species have apothecia black or pale-pruinose, not brown-pruinose, & larger spores; other stubbles have either simple spores or persistent hymenia
None
Sandhill woodland, upland hardwood forest, bottomland forest, on Quercus wood, Nyssa biflora bark
Corticolous & lignicolous, crustose lichenized fungus, photobiont an alga in genus Trebouxia
None
Widely & sparsely scattered records in Ridge & Valley, Southern Blue Ridge & Coastal Plain
Unknown
Rare; an obscure species easily overlooked, and thus its status difficult to assess
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.
Harris, R. C. 1995. More Florida lichens including the 10-cent tour of the pyrenolichens. Unpublished manuscript, Bronx, N.Y.
Malcolm Hodges
13 July 2022