online flora
Brown lichens without apothecia
(1) Melanelixia glabratula
Description
Thallus
Foliose, from 2 to 10 cm in diameter, with lobes more or less applied to the substrate. The determination at the genera/species level requires the use of chemical reagents and microscopic observation.
Foliose, from 2 to 10 cm in diameter, with lobes more or less applied to the substrate. The determination at the genera/species level requires the use of chemical reagents and microscopic observation.
Color
Dark brown or khaki green when dry, lighter green when wet
Dark brown or khaki green when dry, lighter green when wet
Reproduction
Apothecia: very rare
Soralia: present in some species
Isidia: generally present, very variable in shape according to the species, sometimes very fragile and detached by abrasion (4)
Apothecia: very rare
Soralia: present in some species
Isidia: generally present, very variable in shape according to the species, sometimes very fragile and detached by abrasion (4)
Risk of confusion
Melanohalea exasperata, with warts and frequent apothecia
Melanohalea exasperata, with warts and frequent apothecia
Ecology
Substrate
On bark, sometimes on rock
On bark, sometimes on rock
Habitat
Variable
Variable
Occurrence
Variable
Variable
Sensitivity to air pollution
Variable, often resistant to pollution
Variable, often resistant to pollution
(1) Melanelixia glabratula
(3) Melanohalea sp.
(3) Melanohalea sp.: isidia
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