online flora
Physcia adscendens / Physcia tenella
(1) Physcia adscendens / Physcia tenella
Description
Thallus
Foliose, up to 2-3 cm, sometimes confluent with other thalli, can cover large areas, lobes 0.5-1.5 mm broad, margins with pale cilia, darker at the end
Foliose, up to 2-3 cm, sometimes confluent with other thalli, can cover large areas, lobes 0.5-1.5 mm broad, margins with pale cilia, darker at the end
Color
Pale gray
Pale gray
Reproduction
Apothecia: infrequent, 1-2 mm in diameter, disc black and pruinose
Soralia: numerous, greyish, slightly greenish on the edges of the lobes
Isidia: —
Apothecia: infrequent, 1-2 mm in diameter, disc black and pruinose
Soralia: numerous, greyish, slightly greenish on the edges of the lobes
Isidia: —
Risk of confusion
Anaptychia ciliaris is larger and has a fruticose thallus
Physcia leptalea has no soralia but often has apothecia
Physcia aipolia is more attached to the substrate, shows macules and lacks cilia
Anaptychia ciliaris is larger and has a fruticose thallus
Physcia leptalea has no soralia but often has apothecia
Physcia aipolia is more attached to the substrate, shows macules and lacks cilia
Ecology
Substrate
On bark, sometimes on rock or artificial substrate
On bark, sometimes on rock or artificial substrate
Habitat
Nitrophilous
Nitrophilous
Occurrence
Very common, widespread in urban areas
Very common, widespread in urban areas
Sensitivity to air pollution
Resistant to pollution
Resistant to pollution
(2)
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