Opegrapha varia Roccellaceae
Opegrapha varia

Growth type crustose
Chemical results negative. Hymenium I+ red. Epithecium brown, K-

Mainly lowland on shaded trees with rough, basic bark

Very variable. Thin grey or grey-brown thallus, the lirellae usually simple. Disc usually +/- fully open, often with green or grey pruina. Spores 4-6 septate, brown wth age, 20-35 x 5-8 Ám. Microscope photograph below.

Similar: O. herbarum. Discs less open, rarely pruinose. Spores 3-septate.
Opegrapha xerica. Epithecium green, spores 3-5 septate


Opegrapha varia

Opegrapha varia

Opegrapha varia

Opegrapha varia

Microscope photograph
Opegrapha varia

Opegrapha varia

Opegrapha varia
Opegrapha varia
Godlingston Hill and Upton Park, Dorset. October 2012 and January 2013

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