online flora
Physconia distorta
(1) Physconia distorta
Description
Thallus
Foliose, up to 15 cm, radiating lobes (up to 4 mm wide), covered with a white pruinose, especially towards the tips

Color
Brownish gray when dry, green when wet
Reproduction
Apothecia: numerous, 2 to 5 mm in diameter, disk dark, flat, covered with a whitish to bluish pruinose
Soralia: —
Isidia: —
Risk of confusion
Physconia grisea, has rare apothecia and is sorediate
Physcia aipolia/Physcia stellaris, has macules but is not pruinose

Ecology
Substrate
On bark

Habitat
Nitrophilous

Occurrence
Relatively common

Sensitivity to air pollution
Resistant to pollution

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