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Pertusaria saximontana Wetmore
Family: Pertusariaceae
Pertusaria saximontana image
Jason Hollinger  
Thallus: continuous to fissured or fissured-areolate, with moderately thick verrucae; margins: entire, unzoned upper surface: ash gray to greenish gray, smooth or rugose-plicate, shiny, epruinose; lacking soredia or isidia fertile verrucae: concolorous with thallus, lecanorate, numerous, often fused, c. 0.4-1.2 mm in diam. Apothecia: 1 (-5) per verruca; disc: blackish brown, well sunken, epruinose or grayish pruinose, margins crenulate; epithecium: dark brown, K+; hypothecium: hyaline asci: clavate or cylindrical, 150-250 x 45-70 µm, (1-) 2-spored ascospores: hyaline, oval to ellipsoid, 50-140 x 26-58 µm; spore wall: c. 4-14 µm thick, smooth; apices: up to 18 µm thick, 1-layered Pycnidia: not seen Spot tests: K-, C-, KC-, P-, UV- Secondary metabolites: 2-O-methylconfluentic acid (major), di-O-methylolivetoride, planaic acid and traces of unknowns (all minor). Substrate and ecology: on conifers (e.g. Juniperus) and more common on wood World distribution: endemic to North America, particularly at mid-elevations in the Rocky Mountain region Sonoran distribution: mountainous areas of Arizona at 1700-2100 m. Notes: Pertusaria saximontana is characterized by a shiny gray to gray-brown thallus, numerous disciform apothecia with blackish, epruinose discs, a K+ violet epithecium, 2-spored asci, and the presence of 2-O-methylconfluentic acid. It is is a very characteristic species and hardly confused with any other Pertusaria species occurring in southwestern North America.
Pertusaria saximontana image
Jason Hollinger  
Pertusaria saximontana image
Jason Hollinger  
Pertusaria saximontana image
Jason Hollinger  
Pertusaria saximontana image
Jason Hollinger  
Pertusaria saximontana image
Pertusaria saximontana image
Pertusaria saximontana image
Pertusaria saximontana image
Pertusaria saximontana image
Pertusaria saximontana image