Consortium of
North American Lichen Herbaria
- building a Global Consortium of Bryophytes and Lichens as keystones of cryptobiotic communities -
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Usnea ceratina Ach.  
Go To Encyclopedia of Life...
Family: Parmeliaceae
[Lichen ceratinus (Ach.) Lam., moreParmelia ceratina (Ach.) Spreng., Usnea barbata var. ceratina (Ach.) Schaer., Usnea barbata var. plicata , Usnea ceratina f. incurviscens Arnold, Usnea ceratina subsp. incurviscens (Arnold) Motyka, Usnea ceratina var. incurviscens (Arnold) H. Olivier, Usnea incurviscens (Arnold) Motyka ex B. de Lesd., Usnea plicata , Usnea plicata f. nodulosopisifera (Pit. & Harm.) Tav., Usnea plicata var. annulata Müll.Arg., Usnea plicata var. decora (Motyka) Clauzade & Cl. Roux, Usnea plicata var. pendulina (Motyka) Clauzade & Cl. Roux, Usnea plicata var. prostrata (Vain. ex Räsänen) Clauzade & Cl. Roux, Usnea plicata var. rugulosa (Vain.) Clauzade & Cl. Roux, Usnea plicata var. scabra Müll.Arg., Usnea plicata var. scrobiculata (Motyka) Clauzade & Cl. Roux, Usnea plicata var. silvatica (Motyka) Motyka ex Frey, Usnea plicata var. sorediosa Müll.Arg., Usnea plicata var. substrigosa (Müll.Arg.) Zahlbr.]
Usnea ceratina image
Stephen Sharnoff  
  • Greater Sonoran Desert
  • Web Links
Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2007. Lichen Flora of the Greater Sonoran Desert Region. Vol 3.
Thallus: erect-shrubby, subpendulous to pendulous, up to 30 cm long, coarse to slender, stiff to flaccid branching: isotomic- to anisotomic-dichotomous, divergent to parallel basal part: concolorous to the branches, often with a brownish-orange pigment, sometimes brownish-black pigmented at the very base branches: cylindrical to irregular; lateral branches: narrowed or not at point of attachment segments: terete to ridged, cylindrical to ±sausage-like; foveoles and transversal furrows: absent to frequent papillae: nearly absent to frequent especially on main branches, low and indistinct to verrucous tubercles: sparse to numerous, conspicuously raised, at first eroded and white at summit, then bursting to form ulcerose soralia fibercles: absent fibrils: nearly absent to numerous, spinulous (1-3 mm) to long (up to 10 mm), irregularly distributed soralia: nearly absent to numerous, sometimes covering completely the apices, located mainly on young branches or fibrils, arising mainly on the tubercles, plane to convex, frequently capitate isidiomorphs: few to numerous, tufted on soralia pseudocyphellae: absent cortex: thick (6-10%), shiny to vitreous, hard, smooth to densely cracked medulla: thick, dense to compact, rarely loose, pink to wine red pigmented, sometimes not pigmented at all axis: thick, white to pink or yellow pigmented Apothecia: not seen in the area Spot tests: K+ yellowish, C+ yellow, KC+ yellow, P- Secondary metabolites: diffractaic acid (major), barbatic acid (minor), ±4-O-demethylbarbatic acid (minor), ±several accessory substances and fatty acids. Substrate and ecology: coastal to montane areas, mainly on bark of Pinus spp. or sometimes Quercus spp. in low forests on exposed ridges between 200 and 450 m or at high altitude in the mountains of the Sierra Madre Occidental World distribution: Eurasia, eastern, western and south eastern North America, and South America Sonoran distribution: southeastern Arizona, southern California including the Channel Islands, Chihuahua and Sierra Madre Occidental of Sinaloa. Notes: Usnea ceratina is characterized by its tuberculate soralia, its vitreous cortex, its ± pinkish pigmented and compact medulla, its pale base sometimes with a yellowish hue and its production of diffractaic and barbatic acids in the medulla that reacts C+ yellow.
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Usnea ceratina
Open Interactive Map
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Samuel Brinker  
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Jason Hollinger  
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Gary Perlmutter  
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Stephen Sharnoff  
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This project made possible by National Science Foundation Awards: #1115116, #2001500, #2001394