Identification key
Parmotrema perlatum/P. reticulatum
(1) Parmotrema perlatum / P. reticulatum
Description
Thallus
Foliose, 3–20 cm in diameter, ascending lobes (4–15 mm wide), lobe margins sometimes with very short black cilia (less than 2 mm)

Color
Blue-gray to greenish-grey upper surface, black underside
Reproduction
Apothecia: rare, with brownish disc and sorediate margin
Soralia: whitish to greenish, present at the lobe margin, more or less globose (in the shape of pearls)
Isidia: absence
Risk of confusion
Hypogymnia physodes/H. tubulosa, smaller and with a swollen appearance
Ecology
Substrate
On bark

Habitat
Heliophilous

Occurrence
Common

Sensitivity to air pollution
Sensitive to pollution

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