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Cladonia dimorphoclada Robbins
Prostrate Thorn
Federal Protection: No US federal protection
State Protection: No Georgia state protection
Global Rank: G3G5
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: Xeric sandhills, rock outcrops, roadsides
Thallus entirely of pale yellow-green podetia, thalli generally in the range of 2-6 cm across, of low tangles of lax podetia, often arching over toward thallus edges; branch surfaces bumpy; CHEMISTRY: thallus KC+ yellow-gold, other tests negative (usnic acid); FIELD ID possible with experience, but best to confirm with a KC test
Cladonia leporina can resemble this species, but it is greener with larger branches that are wrinkled rather than bumpy, and if it has any KC reaction at all, it is + green-blue
None
Xeric sandhills, rock outcrops, roadsides, on sandy soil, silicious rock & low moss mats
Terricolous/saxicolous fruticose lichenized fungus, photobiont a chlorococcoid alga in genus Trebouxia or Pseudotrebouxia
None
Scattered mostly north of the Fall Line, with a few records from the northern 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.
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
22 July 2022