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Ochrolechia africana Vainio
Family: Ochrolechiaceae
Ochrolechia africana image
Stephen Sharnoff  
Thallus: crustose, verrucose areolate, verrucose or verruculose, becoming thin marginally: prothallus: often present areoles: thin or thick, opaque or glossy surface: white to yellowish gray, smooth to rugose, shiny, epruinose Apothecia: lecanorine, sessile or almost subpedicilate due to a constricted base, 0.6-2(-2.7) mm diam. disc: light yellowish pink to light orange, often white pruinose. K+ yellow, C+ red, KC+ red, P- amphithecium: hyaline, with a thick, well-developed medulla, often with small crystals, with a thin cortex (20-30 µm thick) exciple: hyaline, with a 15-35 µm thick: algal layer hymenium: reddish brown above and hyaline below, 210-320 µm tall; hypothecium: hyaline, 35-40 µm thick, usually with continuous algal layer below asci: clavate, 6- to 8-spored ascospores: hyaline, simple, broadly ellipsoid, 29-45 x 19-28 µm; wall: less than 1 µm thick Pycnidia: not seen Spot tests: thallus K-, C-, KC-, P-, UV +yellow to yellow-orange; medulla of the amphithecium: K-, C+ red, KC+ red, P- Secondary metabolites: cortex with lichexanthone (+major), atranorin (+trace); apothecia with gyrophoric acid (major), lecanoric acid (trace), 5-Omethylhiascic acid (+minor), 4,5-di-O-methylhiascic acid and 4-O-demethylmicrophyllinic acid (both +trace). Substrate and ecology: on bark, common in the coastal plain, especially common on Fouquieria World distribution: tropical and subtropical areas in North and South America and southern Africa Sonoran distribution: coastal southern California, Baja California, Baja California Sur, Sonora and Sinaloa and extending to southern Arizona. Notes: When lichexanthone is present, O. africana may be confused with O. mexicana, but the former differs from the latter in having a C- cortex, usually pruinose discs and lacking an excipular ring around the disc.
Ochrolechia africana image
Frank Bungartz  
Ochrolechia africana image
Troy McMullin  
Ochrolechia africana image
Troy McMullin  
Ochrolechia africana image
Gary Perlmutter  
Ochrolechia africana image
Gary Perlmutter  
Ochrolechia africana image
Gary Perlmutter  
Ochrolechia africana image
Stephen Sharnoff  
Ochrolechia africana image
Chris Parrish  
Ochrolechia africana image
Ochrolechia africana image
Ochrolechia africana image
Ochrolechia africana image
Ochrolechia africana image
Ochrolechia africana image
Ochrolechia africana image
Ochrolechia africana image
Lynda Miller  
Ochrolechia africana image
Ochrolechia africana image
Ochrolechia africana image
Ochrolechia africana image
Ochrolechia africana image
Ochrolechia africana image
Ochrolechia africana image
Ochrolechia africana image
Ochrolechia africana image
Ochrolechia africana image
Ochrolechia africana image
Ochrolechia africana image