Opegrapha mougeotii Roccellaceae
Opegrapha mougeotii

Growth type crustose
Chemical results negative

Found on steep, sheltered limestone, mortared walls and calcareous sandstone. BLS conservation evaluation: LC NS

Thin, often immersed thallus with scattered or contiguous lirellae, the discs soon becoming widely exposed with yellow-green or grey-blue pruina. Spores 5-7(-8) septate, (20-)25-33(-55) 5-8(-10) m. Micro photo below.

Similar: Opegrapha lithyrga (siliceous rocks, 5-7 septate narrower spores), O. calcarea (3-septate spores) and O. areniseda


Opegrapha mougeotii

Opegrapha mougeotii

Opegrapha mougeotii

Opegrapha mougeotii

Microscope photograph
Opegrapha mougeotii, spores
Opegrapha mougeotii
Kimmeridge and Portland, Dorset. February 2014 and 2016

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