online flora
Melanohalea exasperata
(1) Melanohalea exasperata
Description
Thallus
Foliose, up to 6 cm, well attached to the substrate, lobes bearing many small conical warts
Foliose, up to 6 cm, well attached to the substrate, lobes bearing many small conical warts
Color
Upper side reddish-brown to black-brown, turning green in the presence of water
Upper side reddish-brown to black-brown, turning green in the presence of water
Reproduction
Apothecia: often present, bowl-shaped, 2-6 mm in diameter, disc green to brownish, rim with many warts
Soralia: —
Isidia: —
Apothecia: often present, bowl-shaped, 2-6 mm in diameter, disc green to brownish, rim with many warts
Soralia: —
Isidia: —
Risk of confusion
Distinguished from other Melanohalea by its frequent warts and apothecia
Distinguished from other Melanohalea by its frequent warts and apothecia
Ecology
Substrate
On branch, sometimes on bark
On branch, sometimes on bark
Habitat
Heliophilous
Heliophilous
Occurrence
Rather rare
Rather rare
Sensitivity to air pollution
Sensitive to pollution
Sensitive to pollution
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(3)
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(5)
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