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Cladonia grayi G.K. Merrill ex Sandst.
Gray's Pixie-cups
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: Granitic and sandstone outcrops, woodlands, sandhills, roadsides
Green or brown primary thallus of variable squamules (1-3 mm long); podetia 1-2 cm tall, ending in shallow cups, sometimes abundantly proliferating at edges, with brown apothecia; podetia coarsely sorediate or in places with a pebbled surface; CHEMISTRY: K-, PD-/+ red, UV+ bright blue-white; FIELD ID possible, with careful observation & field UV test
Cladonia fimbriata is a similar cupped species, but its podetia are much taller, its soredia finer & its thallus is UV-; C. pyxidata has no soredia on cups, just green rounded areoles or small squamules; other species in the C. chlorophaea group are rare in Ga. & went unrecorded in data-gathering for the atlas project
None
Granitic & sandstone outcrops, woodlands, sandhills, roadsides, on a mix of soil, silicious rock, moss, wood & bark
Saxicolous/terricolous (substrates variable) squamulose/fruticose lichenized fungus, photobiont a chlorococcoid alga in genus Trebouxia or Pseudotrebouxia
Deposit specimens at NYBG for thin-layer chromatography (TLC)
Statewide
Unknown
Presumed common, although most specimens have yet to be confirmed by analysis with TLC
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 Unpublished manuscript, New York Botanical Garden, Bronx, NY.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
13 May 2022