Rinodina oleae Physciaceae
Rinodina oleae (Rinodina gennarii)

Growth type crustose
Chemical results: Thallus K-. Hymenium K+ blue

Pollution tolerant, common on basic or nutrient-rich rocks, walls, concrete, bark and wood.

Greyish or grey-green thallus, sometimes +/- absent. Abundant apothecia, discs brown-black with thick margins that become excluded with age. Spores brown, 1-septate, 13-16 x 7-10 Ám. Micro photo below.
Host to an unidentified species of Muellerella

Similar: Rinodina roboris. K+ yellow, occurs on well-lit bark.
Lecania erysibe has narrower, colourless spores.

Rinodina oleae

Rinodina oleae

Microscope photograph
Rinodina oleae
Rinodina oleae
On timber. Brands Bay, Dorset. January 2013

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