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Clavascidium lacinulatum (Ach.) M. Prieto
Brown Stipplescale
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:
Element Occurrences (EOs) in Georgia: 0
Habitat Summary for element in Georgia: Limerock outcrops, calcareous barrens
Thallus green-olive when wet, chestnut brown dry, made up of scales 2-5 mm in diameter, round or irregular in shape; upper surface flat or contoured with soil, undersides married to soil with small, pale rhizines; centers of some scales with dark spot marking ostiole of pycnidium; in Ga., usually seen in complex with what appears to be either Spilonema revertens or the free-living cyanobacterium Stigonema; MICROSCOPY: cells of lower cortex randomly arranged (not sorted into columns); FIELD ID: requires dissection to examine characteristics of thallus
Placidium lachneum has cells of lower cortex arranged in vertical columns, & lacks rhizines
None
Limerock outcrops, calcareous barrens, on calcareous soil or shallow soil over limestone
Terricolous squamulose lichenized fungus, photobiont a unicellular green alga in genus Myrmecia
None
Cumberland Plateau, Ridge & Valley
Unknown
Rare; 2 of 3 known populations protected
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. & D. Ladd. 2005. Preliminary draft: Ozark lichens. Unpublished manuscript, New York Botanical Garden, Bronx, NY.
Malcolm Hodges
25 July 2022