Headlands Primary Haxby's picture

Lichen on school sticks

Observed: 16th July 2013 By: Headlands Prima...Headlands Primary Haxby’s reputation in Fungi and LichensHeadlands Primary Haxby’s reputation in Fungi and Lichens
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Description:

two colours on one stick, assume it's very common, not sure if it's two different species working together or just one with varied colour

Identifications

Caution: Do NOT use iSpot to identify fungi to eat!

Some fungi are very poisonous so a mistaken ID could have serious consequences.

Species interactions

No interactions present.

Species with which Common Orange Lichen (Xanthoria parietina) interacts

Comments

synan's picture

Colour

In this case the grey colour is due to an absence of the yellow pigment parietin which acts as a sunscreen, shielding the algal partner from UV radiation. Is is often less developed in shaded habitats.

A different colour change when wet is caused by the upper cortex becoming semi-transparent, allowing the green of the algal layer to be seen.

Nigel