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Pertusaria consocians Dibben
Family: Pertusariaceae
Pertusaria consocians image
Stephen Sharnoff  
Thallus: continuous to weakly fissured, with thin to moderately thick verrucae; margins: entire, unzoned upper surface: whitish gray to ash gray, smooth, shiny, epruinose; lacking soredia or isidia fertile verrucae: concolorous with thallus, ampliariate or pertusariate, numerous, often fused, c. 0.5-2.2 mm in diam; ostioles: 1-8 per verruca, blackish brown, sunken Apothecia: 1-7 per verruca; epithecium: dark brown to red-brown, K+ violet; hypothecium: yellowish asci: cylindrical, 250-450 x 45-90 µm, (1-) 2-spored ascospores: hyaline, ellipsoid to fusiform, 95-210 x 35-55 µm; spore wall: 2-layered; outer spore wall: c. 1-5 µm thick; inner spore wall: c. 2-12 µm thick Pycnidia: not seen Spot tests: K+ yellow, C-, KC-, P+ yellow to orange, UV- or + orange-pink Secondary metabolites: stictic acid and 4, 5-dichlorolichexanthone (both majors) and constictic acid (minor). Substrate and ecology: Pertusaria consocians grows primarily on conifers (including Abies) World distribution: endemic to North America, where it is relatively common in the East Sonoran distribution: coastal mountains of southern California. Notes: Pertusaria consocians is a gray lichen with ampliariate or pertusariate verrucae with dark ostioles, 2-spored asci, ellipsoid to fusiform ascospores, and stictic acid and 4,5-dichlorolichexanthone. It is very similar to the European P. pertusa (Weigel) Tuck. and the differences between these taxa have been discussed by Dibben (1980).
Pertusaria consocians image
Troy McMullin  
Pertusaria consocians image
Andrew Khitsun  
Pertusaria consocians image
Andrew Khitsun  
Pertusaria consocians image
Pertusaria consocians image