Identification key
Melanelixia glabratula/Melanohalea exasperatula
(1) Melanelixia glabratula
Description
Thallus
Foliose, up to 10 cm, closely attached to the substratum except at the level of the margins where the lobes are more or less upright
Foliose, up to 10 cm, closely attached to the substratum except at the level of the margins where the lobes are more or less upright
Color
Upper side glossy, brownish to greenish
Upper side glossy, brownish to greenish
Reproduction
Apothecia: extremely rare
Soralia: absence
Isidia: numerous, erect, often branched and giving white spots when passing the finger
Apothecia: extremely rare
Soralia: absence
Isidia: numerous, erect, often branched and giving white spots when passing the finger
Risk of confusion
Distinguished from Melanohalea species by its isidia that give white spots after abrasion
Distinguished from Melanohalea species by its isidia that give white spots after abrasion
Ecology
Substrate
On bark and rock
On bark and rock
Habitat
Ombrophilous
Ombrophilous
Occurrence
Relatively common
Relatively common
Sensitivity to air pollution
Resistant to eutrophication, sensitive to acidity
Resistant to eutrophication, sensitive to acidity
(2)
(3)
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