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Calicium abietinum Pers.
Stubble lichen
Federal Protection: No US federal protection
State Protection: No Georgia state protection
Global Rank: G4G5
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: Mixed pine – hardwood forest
Pale thallus with stipitate black apothecia; disks disintegrating into a powdery black mazaedium; tiny stalk about 0.1 mm, topped by cup of approximately same length; MICROSCOPY: spores brown to greenish, 2-celled, 12-15 x 5-7 µm; FIELD ID: the confusing array of stubble lichens & unlichenized fungi require dissection to sort out
Calicium salicinum has brown pruina on underside of apothecium & small, ornamented spores; C. hyperelloides & C. lenticulare have stalks over 0.5 mm tall, & former is KC+ orange, the latter KC- but with a white-rimmed disk; C. trabinellum has a yellow-pruinose disk; other stubbles have simple spores or persistent hymenia
None
Mixed pine – hardwood forest, on Pinus bark & wood
Corticolous & lignicolous, crustose lichenized fungus, photobiont an alga in genus Trebouxia
None
Piedmont
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. & D. Ladd. 2005. Preliminary draft: Ozark lichens. Unpublished manuscript, New York Botanical Garden, Bronx, NY.
Malcolm Hodges
12 July 2022