Identification key
Pertusaria pertusa
(1) Pertusaria pertusa
Description
Thallus
Crustose, up to 10 cm in diameter, thick, covered with globose warts (1–2 mm in diameter) containing apothecia
Crustose, up to 10 cm in diameter, thick, covered with globose warts (1–2 mm in diameter) containing apothecia
Color
Gray to greenish-grey, thallus edges usually lighter
Gray to greenish-grey, thallus edges usually lighter
Reproduction
Apothecia: numerous, covering most of the thallus, black, located on top of small warts resembling tooth decay
Soralia: absence
Isidia: absence
Apothecia: numerous, covering most of the thallus, black, located on top of small warts resembling tooth decay
Soralia: absence
Isidia: absence
Risk of confusion
None
None
Ecology
Substrate
On bark, rock, or artificial substrate
On bark, rock, or artificial substrate
Habitat
Species with a wide ecological range
Species with a wide ecological range
Occurrence
Common
Common
Sensitivity to air pollution
Moderately sensitive to pollution
Moderately sensitive to pollution
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