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Xanthoparmelia angustiphylla (Gyelnik) Hale
Narrow-lobed Rock-shield
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: Massive rock outcrops, rocky forests
Pale yellow-green thallus with lobes 0.5-2.5 mm wide, somewhat adnate to loosely attached, strap-like; no isidia; apothecia absent to sparse; underside black, brown at lobe tips; CHEMISTRY: medulla K+ yellow (to orangish), PD+ orange (stictic acid complex); FIELD ID: perhaps best sorted in the lab given the array of chemical tests needed
other Xanthoparmelia lacking isidia & with black undersides include rare X. hypomelaena, which has medulla K+ brownish, PD+ red & X. hypofusca, medulla K+ red turning maroon
Xanthoparmelia hypomelaena, X. isidiascens, X. piedmontensis
Massive rock outcrops, rocky forests, on silicious rock
Saxicolous foliose lichenized fungus, photobiont an alga in Trebouxia
None
Scattered sites in Ridge & Valley, Southern Blue Ridge, Piedmont
Unknown
Rare
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 Unpublished manuscript, New York Botanical Garden, Bronx, NY.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
2 August 2022